Mathematics · Basics
Percentage Calculator
Solve the common percentage problems: what is X% of Y, what percent is X of Y, percentage increase/decrease between two numbers, the percent error of a measurement against the true value, and the percent difference between two values.
Your inputs
Your result Live
20% of 200
40
How this is calculated
% change = (Y − X) / |X| × 100 · % error = |measured − true| / |true| × 100 · % difference = |X − Y| / ((|X| + |Y|) / 2) × 100
- X
- Starting value
- Y
- Ending value