In a bag there are blue sweets, red sweets and green sweets. The ratio of blue sweets to red sweets to green sweets is 7:5:8 7:5:8\,7:5:8
What fraction of the sweets are blue?
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.