How do you calculate a percentage?

Divide the part by the whole and multiply by 100. For example, 20 out of 80 is 25%.

Worked example

Choose the total that the part belongs to. A score of 18 from 24 questions is 18 ÷ 24 × 100 = 75%.

Try it with your own numbers

Use the Percentage Calculator to check another example. Read the input labels carefully and keep units consistent.

Before you use the answer

Choose the correct starting quantity and keep full precision until the final step. An arithmetic result describes the numbers entered; the usefulness of the result depends on accurate measurements and the assumptions in the calculation.