Percentage Calculator
Use the Percentage Calculator for common percentage calculations including percentage of a number, percentage change, increases, decreases and reverse percentage problems.
Calculate percentages
How to use the Percentage Calculator
- Choose the percentage calculation you want to perform.
- Enter the required values.
- Select Calculate to get the result instantly.
- The calculator also shows the formula used so you can understand how the result was calculated.
Examples
Find a percentage of a number
20% of 250 is 50 because 0.20 × 250 = 50.
Find what percent one value is of another
30 is 20% of 150 because 30 ÷ 150 × 100 = 20%.
Percentage increase
Increasing 200 by 15% gives 230.
Frequently asked questions
How do I calculate a percentage of a number?
Divide the percentage by 100 and multiply it by the number.
How do I calculate percentage change?
Subtract the original value from the new value, divide by the original value, then multiply by 100.
What is a reverse percentage?
A reverse percentage calculation finds the original value when the percentage and resulting value are known.
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