Alan buys 1.2 kg of sweets. He pays £k for the sweets.
Alan puts the sweets into bags. He puts 150g of sweets in each bag. He sells each bag of sweets for 30p.
Work out Alan's percentage profit in terms of kkk.
222 exam-style questions on OCR GCSE Maths Percentage Change. Each one has a worked solution and a mark scheme showing where the marks go.