Fractions, decimals and percentages: how to convert
21 October 2026
Understanding conversions for 11+ maths
Children sitting the 11+ exam need to be confident with fractions, decimals and percentages. These three forms are just different ways of showing the same value. Being able to convert between them is a key skill for problem solving and reasoning.
Converting a fraction to a decimal
To change a fraction into a decimal, divide the numerator (top number) by the denominator (bottom number).
Worked example
Convert 3/4 to a decimal:
3 ÷ 4 = 0.75
The correct answer is 0.75.
Converting a decimal to a percentage
To turn a decimal into a percentage, multiply the decimal by 100.
Worked example
Convert 0.6 to a percentage:
0.6 × 100 = 60
The correct answer is 60%.
Converting a percentage to a fraction
To change a percentage into a fraction, write the percentage over 100 and simplify if possible.
Worked example
Convert 25% to a fraction:
25/100 = 1/4
The correct answer is 1/4.
Summary of key conversions
To recap: divide to go from fraction to decimal, multiply by 100 to go from decimal to percentage, and put the percentage over 100 to get a fraction. Practising these steps will help your child feel more confident in the 11+ exam.
Key insight: Mastering these conversions helps children tackle a wide range of 11+ maths questions, from word problems to data interpretation. Confidence with fractions, decimals and percentages builds strong foundations for exam success.
