In a bag there are blue sweets, red sweets and green sweets. The ratio of blue sweets to red sweets to green sweets is 4:7:9 4:7:9\,4:7:9
What fraction of the sweets are red?
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.