Percentage Calculator

Three quick percentage tools in one. Switch tabs to find a percentage of a number, work out what percent one number is of another, or measure a percentage change.

RESULT

Formula

X% of Y = X·Y/100 · A is (A/B×100)% of B · Change = (new − old)/old × 100

Example: For example, 15% of 200 is 30.

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Frequently asked questions

How do I find a percentage of a number?

Multiply the number by the percentage and divide by 100. For example, 15% of 200 is 200 × 15 ÷ 100 = 30. The first tab does this for you.

How do I calculate percentage change?

Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result is an increase; negative is a decrease.