Home / Calculators / Percentage calculator
Pick what you want to find, enter two numbers, and see the answer with the formula.
Work out a marks percentage, a percent of any number, or how much something went up or down.
| You want | Formula | Example |
|---|---|---|
| Marks percentage | obtained ÷ total × 100 | 850 ÷ 1100 × 100 = 77.27% |
| Percent of a number | number × percent ÷ 100 | 15% of 2,400 = 360 |
| Percentage change | (new − old) ÷ old × 100 | 50,000 to 60,000 = 20% increase |
A 20% rise followed by a 20% fall does not bring you back to the start. 100 rises to 120, and 20% of 120 is 24, so it falls to 96. Each percentage is taken of the value at that moment.
Divide the marks you got by the total marks and multiply by 100. For example, 850 out of 1100 is 850 ÷ 1100 × 100 = 77.27%.
Multiply the number by the percentage and divide by 100. For example, 15% of 2,400 is 2,400 × 15 ÷ 100 = 360.
Subtract the old value from the new value, divide by the old value and multiply by 100. A salary going from 50,000 to 60,000 is a 20% increase.
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