# Percentage Calculator

Enter a percentage and a number to find that percentage of the number, and the number after adding or taking away that percentage.

Live calculator: https://calc.softool.in/percentage-calculator

## Worked example

20% of 500 is 100. Adding 20% to 500 gives 600, and taking 20% off 500 gives 400.

## Quick answers

- **What is 5% of 1,000?** 5% of 1,000 is 50.
- **What is 10% of 1,000?** 10% of 1,000 is 100.
- **What is 15% of 1,000?** 15% of 1,000 is 150.
- **What is 20% of 1,000?** 20% of 1,000 is 200.
- **What is 25% of 1,000?** 25% of 1,000 is 250.
- **What is 50% of 1,000?** 50% of 1,000 is 500.
- **What is 75% of 1,000?** 75% of 1,000 is 750.

## Percentage table

Common percentages of round numbers.

| Percentage | of 100 | of 500 | of 1,000 | of 5,000 | of 10,000 |
|---|---|---|---|---|---|
| 5% | 5 | 25 | 50 | 250 | 500 |
| 10% | 10 | 50 | 100 | 500 | 1,000 |
| 15% | 15 | 75 | 150 | 750 | 1,500 |
| 20% | 20 | 100 | 200 | 1,000 | 2,000 |
| 25% | 25 | 125 | 250 | 1,250 | 2,500 |
| 50% | 50 | 250 | 500 | 2,500 | 5,000 |
| 75% | 75 | 375 | 750 | 3,750 | 7,500 |

## How it is calculated

`Answer = number × percentage ÷ 100`

Per cent means "out of 100", so 20% of a number is that number multiplied by 20 and divided by 100. To increase a number by a percentage, add the answer to it; to decrease it, subtract the answer.

## Good to know

- To find 10% of a number, move the decimal point one place left. Halve that for 5%.
- A rise of 50% followed by a fall of 50% does not bring you back: you end up 25% lower.
- X% of Y is always the same as Y% of X, which can make mental maths easier.

## Common questions

### How do I find what percentage one number is of another?

Divide the first number by the second and multiply by 100. For example, 45 out of 60 is 45 ÷ 60 × 100 = 75%.

### How do I work out a percentage increase?

Subtract the old value from the new value, divide by the old value and multiply by 100. From 400 to 500 is 100 ÷ 400 × 100 = 25%.

### How do I convert a fraction to a percentage?

Divide the top number by the bottom number and multiply by 100. 3 out of 8 is 3 ÷ 8 × 100 = 37.5%.

### How do I calculate percentage of marks?

Divide the marks you scored by the total marks and multiply by 100. 432 out of 500 is 86.4%.

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Source: https://calc.softool.in/percentage-calculator
Last reviewed: October 2026. Results are estimates, not financial advice.