Write the ratio 20:10 20 : 10\,20:10 in its simplest form
12\displaystyle \frac{1}{2}21 of chocolates in a box are white chocolate, the rest are milk chocolate.
Write the ratio of white chocolates to milk chocolates.
249 exam-style questions on OCR GCSE Maths Writing and Simplifying Ratio. Each one has a worked solution and a mark scheme showing where the marks go.