Alvin and Simon shared £630 in the ratio 4 : 5
Alvin gave half of his share to Theo. Simon gave a tenth of his share to Theo.
What fraction of the £630 did Theo receive?
Hence, work out what fraction of the £630 Alvin and Simon kept altogether.
222 exam-style questions on Eduqas GCSE Maths Ratio. Each one has a worked solution and a mark scheme showing where the marks go.