Ratio: GCSE Maths revision
Ratio compares parts. Simplify by dividing by the HCF, then share amounts by finding the value of one part.
Sharing
Share £60 in the ratio 2 : 3
Full notes: Ratio & proportion guide.
Try these questions
Cover the answers and have a go first. Worked solutions are underneath.
Simplify 18 : 24
Share £35 in the ratio 3 : 4
A map scale is 1 : 25000. 4 cm on the map is how many km?
Red to blue is 2 : 5. There are 14 red sweets. How many blue?
Common mistakes
- Dividing the amount by one part of the ratio instead of the total parts.
Answers and working
Frequently asked questions
How is ratio different from proportion?
Ratio compares parts of a whole. Proportion is about two quantities changing together (direct or inverse).
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