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Percentage Calculator

What do you want to work out?

0–100%

The base number you're finding a percentage of

60
Percentage 20%
Of value 300
Result 60

20% of the total

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How this is calculated

  1. Pick a mode: find a percentage of a number, work out what percentage one value is of another, measure the change between two values, or add and remove a percentage.
  2. Enter your figures in the number boxes. The percentage slider lets you adjust the percentage between 0 and 100 without typing.
  3. To find a percentage of a number, divide the percentage by 100 and multiply by the number. So 20% of 300 is (20 ÷ 100) × 300 = 60.
  4. To find what percentage one number is of another, divide the part by the total and multiply by 100. So 60 out of 300 is (60 ÷ 300) × 100 = 20%.
  5. To find a percentage change, take the difference between the two values, divide by the original, then multiply by 100. From 100 to 120 is (20 ÷ 100) × 100 = 20%.
  6. To add or remove a percentage, work out that percentage of the number, then add it on or take it off. Adding 20% to 100 gives 120, taking 20% off gives 80.

Frequently asked questions

What is a percentage?

A percentage is a number out of 100. So 25% means 25 out of 100, or one quarter. It's used to compare parts to a whole or to show how much something has changed.

How do I work out what percentage is of a number?

Use the "% of number" mode. Enter your percentage and the base number, and the calculator multiplies them together. For example, 20% of 500 = (20 ÷ 100) × 500 = 100.

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

Use the "What % is it?" mode. Divide the smaller number by the larger one and multiply by 100. For example, 25 out of 100 = (25 ÷ 100) × 100 = 25%.

How do I calculate percentage increase or decrease?

Use the "% change" mode. Subtract the original value from the new value, divide by the original, and multiply by 100. For example, if something goes from 100 to 120, that's (20 ÷ 100) × 100 = 20% increase.

How do I add a percentage to a number (like VAT)?

Use the "Add / Remove %" mode and select "Add". This is useful for working out the total price after VAT (20% in the UK), discounts, or pay rises.

What is the difference between percentage points and percent?

A percentage is a proportion (e.g. 25%). Percentage points describe the difference between two percentages (e.g. "interest rates rose by 2 percentage points" means they went from 3% to 5%, not from 3% to 6%).

Recommended reading
Percentage and Decimal Games: 100 Practice Problems

If you're teaching percentages or want to deepen your mental maths, this workbook has hundreds of drills to build confidence.

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This calculator is for general guidance only. It does not replace advice from a qualified financial adviser on your personal circumstances.

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