Dermot bakes 400 cakes. He bakes only vanilla cakes, banana cakes and lemon cakes. 100 of the cakes are vanilla cakes. 25% of the cakes are banana cakes. Work out the number of lemon cakes Dermot bakes.
199 exam-style questions on OCR GCSE Maths Percentages. Each one has a worked solution and a mark scheme showing where the marks go.