A brand of shampoo is available in two different bottles.
900 ml for £5.59£5.59£5.59
400 ml for £2.54 £2.54\,£2.54
Work out which bottle offers the best value for money.
You must show your working.
Hence work out how much cheaper it is to buy 3600 ml of shampoo using the better value bottle rather than the other bottle.
84 exam-style questions on AQA GCSE Maths Best Buy Questions. Each one has a worked solution and a mark scheme showing where the marks go.