At a sports academy, the ratio of coaches to athletes is 1:121:121:12. All of the athletes are either seniors or juniors. The ratio of seniors to juniors is 1:31:31:3.
What fraction of all the people at the academy are juniors?
60 exam-style questions on Edexcel 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.