11+ Maths: Converting between fractions and percentages
21 October 2026
Why converting matters
Understanding how to change fractions into percentages and back is a key skill for the 11+ maths exam. It helps children compare amounts and solve a range of problems confidently.
Step 1: Divide the numerator by the denominator
To convert a fraction to a percentage, start by dividing the top number (numerator) by the bottom number (denominator). This gives you a decimal.
Step 2: Multiply by 100
Take the decimal result and multiply it by 100. This changes the decimal into a percentage.
Worked example
Convert 3/5 to a percentage
3 ÷ 5 = 0.6
0.6 × 100 = 60
The correct answer is 60%.
Key insight: Encourage your child to practise with different fractions, as this builds confidence and helps them spot patterns in common conversions.
