In a cinema the ratio of adults to children is 3:1 The children are all either boys or girls. The fraction of all the people in the cinema who are girls is 110\displaystyle \frac{1}{10}101
What is the ratio of boys to girls?
222 exam-style questions on Eduqas 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.