How to Calculate Percentage Increase Between Two Prices (With Formula and Examples)
When the price of a product, service, or everyday item goes up, knowing the percentage increase helps you understand how much more you are paying. For example, if a product previously cost $80 and now costs $100, the price has increased by $20. But what percentage increase does that represent?
Learning how to calculate percentage increase between two prices is useful for comparing shopping costs, tracking inflation, reviewing business expenses, calculating price changes, and understanding discounts or supplier rate adjustments.
The good news is that you do not need advanced math skills to calculate a percentage increase. You only need the original price, the new price, and a simple formula. You can calculate it manually in a few steps or use the percentage calculator on CalculatorToolsLab.com to get a result quickly.
In this guide, you will learn the percentage increase formula, how to use it step by step, practical examples, common mistakes to avoid, and how to calculate price increases in different situations.
What Is a Percentage Increase Between Two Prices?
A percentage increase measures how much a price has risen relative to its original value. It expresses the difference between the old price and the new price as a percentage of the original price.
For example, suppose a pair of shoes cost $50 last year and costs $65 today.
- Original price: $50
- New price: $65
- Price increase: $15
- Percentage increase: 30%
This means the shoes are now 30% more expensive than they were previously.
Percentage increases are useful because they allow you to compare price changes even when the original prices are different. A $10 increase on a $20 product is much more significant proportionally than a $10 increase on a $200 product.
Percentage Increase Formula Between Two Prices
The standard formula for calculating a percentage increase is:
Percentage Increase = ((New Price − Original Price) ÷ Original Price) × 100
You can also write the formula as:
Percentage Increase = (Price Difference ÷ Original Price) × 100
Here is what each part means:
TermMeaningOriginal priceThe price before the increaseNew priceThe price after the increasePrice differenceNew price minus original pricePercentage increaseThe price difference expressed as a percentage of the original price
The original price is the most important part of the formula. You divide the difference by the original price, not the new price.
Why Do You Divide by the Original Price?
A percentage change measures the difference relative to the starting value. Therefore, the original price serves as the reference point.
For example, if a product increases from $40 to $50, the increase is $10.
Dividing $10 by the original price of $40 gives 0.25. Multiplying by 100 converts the decimal into a percentage, resulting in a 25% increase.
If you divide by the new price instead, you get a different answer that does not represent the standard percentage increase.
How to Calculate Percentage Increase Between Two Prices Step by Step
Follow these four simple steps to calculate a price increase manually.
Step 1: Identify the Original Price
Find the price before the increase.
For example, suppose a monthly subscription previously cost $120.
Your original price is $120.
Step 2: Identify the New Price
Next, determine the price after the change.
Suppose the subscription now costs $150.
Your new price is $150.
Step 3: Calculate the Price Difference
Subtract the original price from the new price.
Price Difference = New Price − Original Price
Price Difference = $150 − $120
Price Difference = $30
The subscription has increased by $30.
Step 4: Divide by the Original Price and Multiply by 100
Use the percentage increase formula:
Percentage Increase = ($30 ÷ $120) × 100
Percentage Increase = 0.25 × 100
Percentage Increase = 25%
Therefore, the monthly subscription price has increased by 25%.
You can apply the same process to grocery prices, rent, salaries, product costs, utility bills, and other values.
Percentage Increase Examples Using Different Prices
The easiest way to understand the formula is to see how it works in real-life situations.
Example 1: A Product Price Increases From $20 to $25
Suppose a kitchen accessory originally costs $20 but now sells for $25.
Original price = $20
New price = $25
Price difference = $25 − $20 = $5
Percentage increase = ($5 ÷ $20) × 100
Answer: 25% increase
Although the price increased by only $5, that change represents one-quarter of the original price.
Example 2: A Laptop Price Increases From $800 to $920
Suppose a laptop that previously cost $800 now costs $920.
Price difference = $920 − $800 = $120
Percentage increase = ($120 ÷ $800) × 100
Percentage increase = 0.15 × 100
Answer: 15% increase
This method helps you understand the relative size of a price change rather than looking only at the amount added.
Example 3: Grocery Prices Increase From $40 to $46
Imagine that your usual grocery basket costs $40 one month and $46 the following month.
Price difference = $46 − $40 = $6
Percentage increase = ($6 ÷ $40) × 100
Answer: 15% increase
You are spending 15% more on the same basket of groceries, assuming the items and quantities have not changed.
Example 4: Monthly Rent Increases From $1,200 to $1,320
Suppose your monthly rent rises from $1,200 to $1,320.
Price difference = $1,320 − $1,200 = $120
Percentage increase = ($120 ÷ $1,200) × 100
Answer: 10% increase
This calculation is useful when reviewing rental agreements or comparing housing costs over time. Actual rent increases may also depend on your lease and local regulations.
Example 5: A Product Price Increases From ₹500 to ₹650
The same formula works with Indian rupees or any other currency.
Original price = ₹500
New price = ₹650
Price difference = ₹650 − ₹500 = ₹150
Percentage increase = (₹150 ÷ ₹500) × 100
Answer: 30% increase
The product's price has increased by 30%.
Notice that the currency symbol does not affect the calculation. As long as both prices use the same currency and unit, the formula remains unchanged.
Quick Percentage Increase Reference Table
Use this table to understand how different price changes translate into percentages.
Original PriceNew PricePrice IncreasePercentage Increase$10$12$220%$20$25$525%$50$60$1020%$100$120$2020%$200$250$5025%$500$650$15030%₹1,000₹1,100₹10010%₹2,000₹2,400₹40020%
These examples show that the amount of money added does not tell you the percentage increase on its own. You must consider the original price.
How to Calculate Percentage Increase Using CalculatorToolsLab.com
If you need to calculate price increases frequently, an online percentage calculator can save time and reduce arithmetic errors.
CalculatorToolsLab.com can be used as a convenient starting point for percentage calculations. If its percentage calculator supports percentage change, enter the original and new prices to obtain the result.
Follow these general steps:
- Open CalculatorToolsLab.com.
- Navigate to the relevant percentage calculator.
- Enter the original price in the starting-value field.
- Enter the new price in the ending-value field.
- Select the calculate option, if available.
- Review the percentage increase and check the result against your expected price difference.
For example, enter an original price of 250 and a new price of 300.
The price difference is 300 − 250 = 50.
The percentage increase is (50 ÷ 250) × 100 = 20%.
Always check that the original and new prices are entered in the correct fields. Reversing them can change the meaning of the result.
If you are calculating several price changes, an online calculator is particularly useful because you can repeat the process without performing every step manually.
How to Calculate Percentage Increase in Excel or Google Sheets
Excel and Google Sheets are helpful when you need to compare many prices in a spreadsheet.
Suppose you have the following data:
CellValueA2: Original Price100B2: New Price125
To calculate the percentage increase, enter this formula in cell C2:
=((B2-A2)/A2)*100
The result is 25.
If you want the result displayed with a percentage sign, use this formula instead:
=(B2-A2)/A2
Then format cell C2 as a percentage.
The result will appear as 25%.
Calculate Percentage Increases for Multiple Products
If you have a list of products, place the original prices in column A and the new prices in column B.
Enter the percentage formula in the first result row, such as C2, and copy it down the column.
This allows you to compare price changes across dozens or hundreds of products.
Important: If an original price is zero, the standard percentage increase formula cannot be calculated because division by zero is undefined. Check such entries separately rather than treating them as ordinary price increases.
How to Calculate Percentage Decrease Between Two Prices
Sometimes a price falls instead of rising. In that case, you can calculate the percentage decrease using a similar formula.
Percentage Decrease = ((Original Price − New Price) ÷ Original Price) × 100
For example, suppose a product's price falls from $100 to $80.
Price decrease = $100 − $80 = $20
Percentage decrease = ($20 ÷ $100) × 100
Answer: 20% decrease
The distinction is important when comparing sale prices, discounts, and price changes over time.
You can also use the general percentage change formula:
Percentage Change = ((New Price − Original Price) ÷ Original Price) × 100
With this version:
- A positive result means an increase.
- A negative result means a decrease.
- A result of zero means there has been no change.
For the change from $100 to $80, the result is −20%, indicating a 20% decrease.
Percentage Increase vs. Percentage Points
Percentage increases and percentage-point changes are not the same thing.
A percentage increase measures the relative change between two values. A percentage-point change measures the direct difference between two percentages.
For example, suppose a tax rate rises from 10% to 12%.
- Percentage-point increase: 12% − 10% = 2 percentage points.
- Relative percentage increase: ((12 − 10) ÷ 10) × 100 = 20%.
The rate increased by 2 percentage points, which is a 20% relative increase.
This distinction is useful when comparing tax rates, interest rates, inflation rates, and other figures already expressed as percentages.
Common Mistakes When Calculating Price Increases
Even though the formula is simple, a few mistakes can lead to incorrect results.
1. Dividing by the New Price
One of the most common mistakes is dividing the price difference by the new price instead of the original price.
For example, when a price rises from $50 to $60, the increase is $10.
The correct calculation is:
($10 ÷ $50) × 100 = 20%
Dividing by $60 would produce approximately 16.67%, which is not the standard percentage increase.
2. Subtracting the Prices in the Wrong Order
Always calculate the difference as:
New Price − Original Price
If you subtract the new price from the original price when calculating an increase, you will get a negative result.
A negative result normally indicates that the value decreased, not increased.
3. Confusing the Price Difference With the Percentage Increase
A price increase of $15 is an amount, not a percentage.
If the original price is $30, the $15 increase represents 50%.
If the original price is $150, the same $15 increase represents 10%.
Always divide by the original price to calculate the percentage.
4. Comparing Prices in Different Currencies
If the original price is in US dollars and the new price is in Indian rupees, you cannot directly apply the formula to those two amounts.
Convert both values into the same currency using an appropriate exchange rate first. For an accurate financial comparison, also consider any relevant conversion fees and differences in timing.
5. Ignoring Changes in Product Size or Quantity
A package might cost more because its price increased, or it might contain more or less of the product.
For example, a 1-liter bottle may cost ₹100, while a 750-milliliter bottle costs ₹90.
The total price has fallen by 10%, but the cost per liter has increased from ₹100 to ₹120.
When package sizes change, compare the unit price as well as the total price to understand the actual cost difference.
Why Is Calculating Percentage Increase Useful?
Understanding price increases can help with everyday decisions and business planning.
Shopping and Budgeting
Compare the current prices of groceries, electronics, clothing, fuel, and household essentials with their previous prices. This can help you identify where your spending has increased most.
Business Pricing
Business owners can calculate how much supplier costs, shipping fees, raw materials, or operating expenses have increased.
For example, if a component rises from ₹80 to ₹92, its cost has increased by 15%. This information can support pricing and budgeting decisions, although the final selling price may also depend on demand, competition, and profit margins.
Salary and Income Comparisons
The same formula can calculate the percentage increase in salary.
If your annual salary increases from ₹400,000 to ₹440,000, the increase is ₹40,000, or 10%.
However, a 10% salary increase does not necessarily mean your purchasing power has increased by 10%. Taxes, inflation, and other expenses can affect your real financial position.
Tracking Inflation and Historical Prices
Comparing the prices of the same products over different periods helps you understand how individual costs have changed.
However, the percentage increase for one product is not the same as an official inflation rate. Inflation measures changes in the prices of a broader basket of goods and services using a defined methodology.
Frequently Asked Questions
1. What is the formula for percentage increase between two prices?
The formula is:
Percentage Increase = ((New Price − Original Price) ÷ Original Price) × 100.
Subtract the original price from the new price, divide the difference by the original price, and multiply by 100.
2. How do I calculate the percentage increase from one price to another?
First, subtract the original price from the new price. Then divide that difference by the original price and multiply by 100.
For example, an increase from $80 to $100 equals (($100 − $80) ÷ $80) × 100 = 25%.
3. How much percentage increase is there from 100 to 150?
The difference is 150 − 100 = 50.
Percentage increase = (50 ÷ 100) × 100 = 50%.
Therefore, the increase is 50%.
4. How do I calculate a 10% increase in price?
Multiply the original price by 1.10 to obtain the new price after a 10% increase.
For example, if the original price is ₹500:
₹500 × 1.10 = ₹550.
The new price is ₹550, and the increase is ₹50.
5. How do I calculate a 20% increase in price?
Multiply the original price by 1.20.
If a product costs $200, the new price after a 20% increase is:
$200 × 1.20 = $240.
The price has increased by $40.
6. Can the percentage increase be more than 100%?
Yes. A percentage increase can exceed 100% when the increase is greater than the original price.
For example, if a product rises from $50 to $125, the difference is $75.
Percentage increase = ($75 ÷ $50) × 100 = 150%.
The new price is 2.5 times the original price.
7. What happens if the new price is lower than the original price?
The result of the general percentage change formula will be negative.
For example, a price falling from $80 to $60 produces a change of (($60 − $80) ÷ $80) × 100 = −25%.
This indicates a 25% decrease rather than an increase.
8. Can I calculate percentage increase if the original price is zero?
No, not with the standard formula. Because the original price is the denominator, dividing by zero is undefined.
If a price changes from zero to a positive amount, describe the absolute increase or use another meaningful baseline rather than reporting a standard percentage increase.
9. Is percentage increase the same as markup?
No. A percentage increase compares a new value with an earlier value. A markup measures how much the selling price exceeds the cost, relative to that cost.
For example, if a product costs $80 and sells for $100, the markup is (($100 − $80) ÷ $80) × 100 = 25%.
The calculation looks similar because both use the starting cost as the reference, but they describe different business situations.
10. How can I calculate percentage increase quickly without a calculator?
Subtract the original price from the new price, divide by the original price, and multiply by 100.
For simple values, you can use fractions to make the calculation easier. For instance, an increase from 200 to 250 is 50 divided by 200, or one-quarter. One-quarter equals 25%.
For repeated calculations, a spreadsheet or online percentage calculator can save time.
Conclusion
Calculating the percentage increase between two prices is a straightforward way to understand how much a product, service, or expense has become more expensive.
Remember the main formula:
Percentage Increase = ((New Price − Original Price) ÷ Original Price) × 100
Start with the original price, subtract it from the new price, divide the difference by the original price, and multiply by 100. The result tells you the relative increase.
Whether you are comparing shopping costs, checking rent changes, reviewing supplier prices, or calculating a salary increase, this method provides a clear and consistent answer.
For quick calculations, visit CalculatorToolsLab.com and use the relevant percentage calculator, if available, to check your results without doing every step manually. Understanding percentage increases can help you make better comparisons, manage expenses, and evaluate price changes with greater confidence.
