There are only blue counters, red counters and yellow counters in a bag.
The ratio of blue counters to red counters to yellow counters is 2:3:12:3:12:3:1.
Write down how many times as many blue counters as yellow counters and how many times as many red counters as yellow counters.
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.