A brand of shampoo is available in two different bottles.
600 ml for £3.90£3.90£3.90
400 ml for £2.40 £2.40\,£2.40
Work out which bottle offers the best value for money.
You must show your working.
84 exam-style questions on Eduqas GCSE Maths Best Buy Questions. Each one has a worked solution and a mark scheme showing where the marks go.