Percentages
Percentage calculator
Work out any percentage of a number. Enter the percentage and the total to see the answer and exactly how to calculate it.
How to calculate it
A percentage is a fraction out of 100. Converting it into a decimal lets you apply it to any quantity. For example, 15% is 15 out of 100, or 0.15. Multiplying 200 by 0.15 gives 30.
Worked examples
| Example | Working | Answer |
|---|---|---|
| 15% of 200 | 15 ÷ 100 × 200 | 30 |
| 20% of 85 | 20 ÷ 100 × 85 | 17 |
| 7.5% of 240 | 7.5 ÷ 100 × 240 | 18 |
| 125% of 80 | 125 ÷ 100 × 80 | 100 |
Frequently asked questions
Can a percentage be more than 100?
Yes. 100% means the whole amount, and 125% means one and a quarter times that amount. For example, 125% of 80 is 100.
How do I find what percentage one number is of another?
Divide the part by the whole and multiply by 100. For example, 30 ÷ 200 × 100 = 15%. This tool does the reverse: it finds the part when you know the percentage and whole.
Can I use decimal percentages?
Yes. Enter 7.5 for 7.5%, for example. Results are displayed with up to 12 significant digits, so very small rounding differences may occur.
Method: standard arithmetic. Examples are illustrative. How our calculators work.