Percentage calculator
Work out percentages three ways: a percent of a number, one number as a percent of another, and increases or decreases.
About this calculator
Use the first box to find a percentage of a number, such as 15% of 240. Use the second to find what percent one number is of another. Use the third to raise or lower a number by a percentage.
To find a percent by hand, divide by 100 and multiply. So 15% of 240 is 0.15 × 240 = 36.
Common questions
How do I work out a percentage of a number?
Divide the percentage by 100, then multiply by the number.
How do I increase a number by a percentage?
Multiply by 1 plus the percentage as a decimal. To add 10%, multiply by 1.1.
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