Write the ratio 45:20 45 : 20\,45:20 in its simplest form
17\displaystyle \frac{1}{7}71 of the counters in a bag are blue.
Write the ratio of blue counters to counters that are not blue.
Practise OCR GCSE Maths Writing and Simplifying Ratio with exam-style questions for Foundation and Higher tier. 64 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.