In a bag there are only red sweets and yellow sweets. k5\displaystyle \frac{k}{5}5k of the sweets are red.
Write down the ratio of red sweets to yellow sweets in terms of kkk?
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.