Percentage Calculator
Three everyday percentage questions in one tool: X% of Y, X as a percent of Y, and the percent change from X to Y.
Frequently asked questions
How do I calculate a percentage increase?
Subtract the old value from the new value, divide by the old value and multiply by 100. From 80 to 100 is (100 − 80) ÷ 80 × 100 = 25%.
How do I find 15% of a number?
Multiply the number by 0.15. For example, 15% of 80 is 12.