Math & Statistics
Percentage Calculator
Calculate X% of Y, or what percent X is of Y.
A versatile percentage tool: find a percentage of a number, what percent one number is of another, or the percent change between two numbers.
25% of 200
50.00
- reverse
- 12.50% (X is this % of Y)
- increase
- 250.00 (Y increased by X%)
- decrease
- 150.00 (Y decreased by X%)
Formula and method
X% of Y = (X/100) × Y
Standard percentage arithmetic.
Worked examples
25% of 200
- X (percent):
- 25
- Y (number):
- 200
25% of 200: 50.00
Assumptions and limits
This tool provides an educational estimate. Rules, rates and personal circumstances can change the answer. Review the assumptions before relying on a result. Report a correction.
Common mistakes to avoid
- Confusing percent change with percentage points.
Frequently asked questions
Percent vs percentage points?
Going from 10% to 15% is 5 percentage points but a 50% relative increase.
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