Understanding Percentages Out of 100 for 11+ Maths
21 October 2026
What are percentages
A percentage is a way of describing a part of a whole, always out of 100. For example, 25% means 25 out of every 100 parts.
Percentages are a key topic in 11+ maths because they help children compare quantities, solve word problems, and understand results.
Why percentages matter for 11+
Questions about percentages appear often in the 11+ exam. Children may be asked to find a percentage of a number, or to work out what percentage one number is of another.
Understanding how to calculate percentages out of 100 builds confidence and accuracy.
Worked example
A child scores 45 out of 60 marks. What percentage is that out of 100
Step 1
Divide the score by the total marks. 45 ÷ 60 = 0.75
Step 2
Multiply by 100 to find the percentage. 0.75 × 100 = 75
Step 3
Check if rounding is needed. In this case, the answer is already a whole number.
The correct answer is 75%.
Key insight: Practise with different examples
Encourage your child to practise finding percentages out of 100 using a variety of numbers. Understanding the basic method. Divide, then multiply by 100. Will help them solve percentage questions with confidence.
