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Percentage Calculator

Find a percent of a number, percentage change, and what % one number is of another.

Enter values

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The formula

percent = (X / Y) × 100

Percentages express one number as a share of another in hundredths, which makes very different quantities easy to compare. The same three moves — divide, multiply by 100, or scale by (1 ± p/100) — cover discounts, mark-ups, statistics and everyday “what share is this?” questions.

All calculations run locally in your browser and update instantly as you type.

Example calculations

Common questions this calculator answers — select one to load its values.

What percentage is 25 of 200? 25 is what % of 200 12.5 % What is 15% of 60? 15 is what % of 60 25 % What percentage is 45 out of 60 on a test? 45 is what % of 60 75 %

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Frequently asked questions

How do I find what percent X is of Y?+
Divide X by Y and multiply by 100. For example, 25 is 12.5% of 200 because 25 / 200 × 100 = 12.5.
How do I add a percentage to a number?+
Multiply the number by (1 + percent/100). To add 20% to 50: 50 × 1.20 = 60.
All calculations run locally in your browser. Nothing you type is sent to a server.