In a bag there are blue sweets, red sweets and green sweets. The ratio of blue sweets to red sweets to green sweets is 5:3:2
Verify that the fraction of the sweets that are green is 15\displaystyle \frac{1}{5}51.
222 exam-style questions on OCR GCSE Maths Writing a Ratio as a Fraction or Linear Function. Each one has a worked solution and a mark scheme showing where the marks go.