Discounts
Find what you pay after applying a promotion.
Math
Percentage calculator
Calculate percentages, discounts, increases and changes between values with clear instant results.
Interactive percentage calculator
What is X% of a number?
Example: 20% of 350.
%
What percentage is X of Y?
Example: 45 of 200.
Percentage change between two values
Example: from 80 to 100.
Add a percentage to a number
Example: 500 + 16%.
%
Subtract a percentage from a number
Example: 1,200 with a 30% discount.
%
Increases
Compare an initial and final value to see how much it grew.
Read guideTaxes
Add a percentage to a base amount to estimate totals.
Grades
Find what percentage a partial result represents.
Read guideRelated guides
Explore common percentage cases before or after using the calculator.
How to calculate percentages
Review the base formulas for percentages, parts of a total and percentage change.
Read guideWhat is percentage increase?
Compare original and new values to understand a change relative to its starting point.
Read guideWhat percentage is one number of another?
Use part divided by total to find what percentage one value represents.
Read guideCommon percentages
Quick references for common amounts.
10% of $100
$10
15% of $500
$75
20% of $1,200
$240
25% of $1,200
$300
Frequently asked questions
How do you calculate a percentage of a number?
Multiply the base number by the percentage divided by 100. For example, 20% of 350 is 350 x 0.20 = 70.
How do you find what percentage one value is of another?
Divide the partial value by the total and multiply by 100. For example, 45 of 200 is (45 / 200) x 100 = 22.5%.
How do you calculate percentage increase or decrease?
Subtract the original value from the new value, divide by the original value and multiply by 100. A negative result means a decrease.
How do you calculate a discount?
Multiply the base price by the discount percentage divided by 100, then subtract that discount from the base price.
What formula is used for percentages?
The general formula is part / total x 100. To get a percentage of a number, use percentage / 100 x number.