Percentage calculator
Quickly calculate a percentage of a number or the percentage change between two values.
What is X% of a number?
15% of 20030
Percentage increase or decrease
Percentage increase25%
How to calculate a percentage
To find a percentage of a number, convert the percentage to a decimal and multiply it by the number. For example, 15% of 200 is 0.15 × 200 = 30.
How to calculate percentage change
Subtract the original value from the new value, divide the difference by the original value, then multiply by 100. A positive result is an increase; a negative result is a decrease. Percentage change is undefined when the original value is zero.
Estimate take-home salary or browse all free tools.