How to work out percentages
- Choose the question. X% of Y, what percentage X is of Y, or the percentage change from one number to another.
- Type the two numbers. The answer updates as you type, with the working shown underneath.
Questions people ask
How do I work out a percentage of a number?
Multiply the number by the percentage and divide by 100. 15% of 200 = 200 × 15 ÷ 100 = 30.
How do I find what percentage one number is of another?
Divide the first by the second and multiply by 100. 30 out of 200 = 30 ÷ 200 × 100 = 15%.
How do I calculate percentage increase?
Take the new value minus the old value, divide by the old value, then multiply by 100. From 80 to 100 is (100 − 80) ÷ 80 × 100 = 25%.
What's the difference between percentage change and percentage points?
If a rate goes from 2% to 3%, that's 1 percentage point, but a 50% increase.
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