Percentage Calculator

This calculator covers the three percentage questions people search for most: finding a percentage of a number, finding what percentage one number is of another, and finding percentage change.

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Formula

X% of Y: (X/100) × Y

X is what % of Y: (X/Y) × 100

% change from X to Y: ((Y − X) / X) × 100

Worked Example

20% of 200 = 40. 40 is 20% of 200. The percentage change from 100 to 150 is +50%.

How to Use

  1. Choose which of the three calculations you need.
  2. Enter the two numbers involved.
  3. Read the result instantly.

Frequently Asked Questions

What's the difference between percentage and percentage points?
A change from 20% to 25% is a 5 percentage-point increase, but a 25% relative increase in the underlying percentage u2014 these two ways of describing the same change can look very different and are often confused.
Can percentage change be negative?
Yes u2014 if Y is smaller than X, the percentage change calculation returns a negative number, correctly indicating a decrease.
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