Converting decimals to percentages for 11+ maths
21 October 2026
Why decimals and percentages matter
Decimals and percentages appear often in 11+ maths. Children need to move confidently between them to answer exam questions quickly and accurately.
How to convert a decimal to a percentage
To change a decimal into a percentage, multiply the decimal by 100. Then write the percent sign (%) after your answer.
Worked example
Convert 0.75 to a percentage
Step 1: Take the decimal 0.75
Step 2: Multiply 0.75 by 100
0.75 × 100 = 75
Step 3: Add the percent sign
The correct answer is 75%
Key insight: If your child finds it tricky, remind them that 'percent' means 'out of 100'. Multiplying by 100 shows how many parts out of 100 the decimal represents.
