Converting fractions to percentages for 11+ maths
19 October 2026
Why fractions to percentages matter
Converting between fractions and percentages is a key skill in 11+ maths. Many questions require children to switch forms quickly, especially in word problems. Understanding this process helps your child answer with confidence and accuracy.
Step-by-step: how to convert
To turn a fraction into a percentage, divide the top number (numerator) by the bottom number (denominator). Then, multiply the result by 100. For example, 3/4 becomes 3 divided by 4, which is 0.75. Multiply by 100 to get 75%.
Common fractions to remember
Some fractions come up often in 11+ questions. It helps to know these by heart:
- 1/2 = 50%
- 1/4 = 25%
- 3/4 = 75%
- 1/5 = 20%
- 1/10 = 10%
Encourage your child to practise these until they feel natural.
Key insight: Use simple numbers first
If your child finds a fraction tricky, suggest they start with easy examples. For instance, try converting 1/2 or 1/4 before moving on to more complex cases like 3/8. Building confidence with simple numbers makes the harder ones less daunting.
Supporting practice at home
Work through a few examples together, using real-life contexts. For example, ask, 'What percentage of a pizza is 1/5?' or 'If you get 7 out of 8 questions right, what percentage is that?' Relating maths to everyday situations helps ideas stick.
Checking answers and avoiding mistakes
Remind your child to check their work by reversing the process: turn the percentage back into a fraction to see if it matches the original question. This habit can catch simple errors before they become habits.
