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Percentage Calculator
Calculate a percentage of a number, find what percent one number is of another, or work out percentage change. Runs in your browser.
What is X% of Y
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Work out percentages three ways: what is X% of Y, X is what percent of Y, and the percentage change between two numbers. Useful for discounts, marks, tips, and growth.
How to use
- Pick the type of percentage calculation you need.
- Enter the two numbers.
- Calculate to see the result.
Frequently asked questions
How do I calculate what percentage one number is of another?
Divide the part by the whole and multiply by 100. For example, 30 out of 150 is (30 ÷ 150) × 100 = 20%. Use the 'X is what % of Y' mode and the tool does it for you.
How do I find percentage increase or decrease?
Use the 'percentage change' mode: it computes (new − old) ÷ old × 100. A positive result is an increase, a negative one a decrease.
Can it calculate a percentage of a number?
Yes, the 'X% of Y' mode gives you, for example, 15% of 2000 = 300.