Free Maths Calculator

Percentage Calculator

Yes. This free percentage calculator shows every step of the method the way it is taught at school: write the percentage as a decimal, then multiply. Each answer ends with a 10% check, and the worked example and practice questions build answers up from 10% and 5%, so it suits homework, discounts, test marks and 11+ questions.

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Answer

Method, Step by Step

    Worked Example

    A coat costs £240 and is reduced by 15% in a sale. How much money is taken off?

    1. Write 15% as a decimal:15 ÷ 100 = 0.15
    2. Multiply by the price:0.15 × 240 = 36
    3. Check with 10%:10% of £240 is £24, and 5% is half of that, £12. £24 + £12 = £36

    Answer: £36

    Try These Yourself

    Find 20% of 85.Show answerHide answer

    Answer: 17

    10% of 85 is 8.5, so 20% is double that: 17.

    Find 35% of 60.Show answerHide answer

    Answer: 21

    10% is 6, so 30% is 18. 5% is 3. 18 + 3 = 21.

    Find 5% of 480.Show answerHide answer

    Answer: 24

    10% of 480 is 48, and 5% is half of that: 24.

    Questions Parents Ask

    Is there a percentage calculator that shows the method step by step, the way it is taught at school?

    Yes, this one does. Type in the percentage and the amount, and it writes out each step: divide the percentage by 100 to turn it into a decimal, multiply by the amount, then check the answer against 10% of the amount. The worked example and practice answers also show the 10% and 5% build-up used in primary school and 11+ maths, and it is free with no sign-up.