Free Maths Calculator

What Percentage Calculator

Turn one number into a percentage of another: enter the part and the whole, and the calculator writes the fraction, divides it, and scales it up to 100, set out exactly the way it should be on paper. Perfect for test marks out of a total, survey results and comparing two amounts fairly.

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    Worked Example

    Amira scores 45 out of 60 in a maths test. What percentage is that?

    1. Write the score as a fraction: 45/60
    2. Divide:45 ÷ 60 = 0.75
    3. Multiply by 100:0.75 × 100 = 75, so the score is 75%

    Answer: 75%

    Try These Yourself

    What percentage is 18 out of 24?Show answerHide answer

    Answer: 75%

    18 ÷ 24 = 0.75, then × 100 gives 75%.

    What percentage is 30 of 150?Show answerHide answer

    Answer: 20%

    30 ÷ 150 = 0.2, then × 100 gives 20%.

    You score 34 out of 40 in a spelling test. What percentage is that?Show answerHide answer

    Answer: 85%

    34 ÷ 40 = 0.85, then × 100 gives 85%.