Percentage Calculator
Work out percentages three ways: X% of Y, X is what % of Y, and percentage increase or decrease.
20% of 150 is
30
About the percentage calculator
This percentage calculator handles the three most common everyday questions: finding a percentage of a number, working out what percentage one number is of another, and calculating a percentage increase or decrease between two values.
Percentages appear throughout personal finance — interest rates, savings rates, investment returns and discounts — so being able to work them out quickly is a useful everyday skill.
Frequently asked questions
How do I calculate a percentage of a number?
Divide the percentage by 100 and multiply by the number. For example, 20% of 150 is (20 ÷ 100) × 150 = 30.
How do I calculate percentage change?
Subtract the original value from the new value, divide by the original value, then multiply by 100. A rise from 100 to 125 is a 25% increase.
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