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Percentage Calculator
Find a percent of a number, a ratio as a percentage, or the percentage change between two values.
Result
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How to calculate percentages
Percent of a number: multiply the number by the percentage and divide by 100.
X is what percent of Y: divide X by Y and multiply by 100.
Percentage change: (new − old) ÷ old × 100. A positive result is an increase, negative is a decrease.
Frequently asked questions
How do I calculate X percent of a number?
Multiply the number by the percentage and divide by 100. For example, 20% of 150 is 150 × 20 ÷ 100 = 30.
How do I find what percentage one number is of another?
Divide the first number by the second and multiply by 100. For example, 30 is 30 ÷ 150 × 100 = 20% of 150.
How do I calculate percentage increase or decrease?
Subtract the old value from the new value, divide by the old value, and multiply by 100.