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GCSERevision SheetRatio and Proportion
Ratio and Proportion Quick Revision Sheet
A compact Ratio and Proportion summary with key facts, methods, reminders and common mistakes.
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Revision Sheet
Ratio and Proportion: Revision Sheet
Remind me what I need to know.
A compact summary for quick review before practice, homework, mocks or exams.
Key facts and formulasImportant vocabularyMini examplesCommon mistakesQuick memory checks
Find the unit amount or multiplier, then apply that same relationship to the new value.
Key strands
- ratio
- scale
- percentages
- compound measures
- proportion
Revision checklist
- Can I identify the multiplier?
- Can I compare part-to-part and part-to-whole?
- Can I use ratio in geometry, rates and money contexts?
Common mistakes
- Using the total as one part in ratio sharing
- Squaring or cubing the wrong scale factor
- Forgetting that inverse proportion goes the opposite way