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Summary Fractions, Decimals, Percentages and ratio GCSE WJEC Maths

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2025/2026 Written for academic year
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Maths
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This powerpoint is an excellent explanation and summary of the key part of the WJEC GCSE new maths course which includes examples and a test at the end with a challenge question.

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Fractions, Decimals,
Percentages and Ratio
Simple Tips and Tricks

,Simplifying Fractions
When a fraction is in its simplest form, the numerator and the
denominator will have no common factors other than 1.

To simplify a fraction just divide the top and bottom number by their
Highest Common Factor (HCF).

Example:

Simplify 18/24
The HCF of 18 and 24 is 6.
18 ÷ 6 = 3
24 ÷ 6 = 4 So the answer is 3/4

, Equivalent Fractions

Equivalent fractions have the same value.

Multiply or divide the top and bottom by the same number.

Example:

Multiplying the top and bottom numbers by 2.

2/5 = 4/10 = 8/20

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Study
GCSE
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1
Uploaded on
July 15, 2026
Number of pages
20
Written in
2025/2026
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Summary
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