A brand of shampoo is available in two different bottles.
700 ml for £4.90£4.90£4.90
500 ml for £3.00 £3.00\,£3.00
Work out which bottle offers the best value for money.
You must show your working.
84 exam-style questions on OCR GCSE Maths Best Buy Questions. Each one has a worked solution and a mark scheme showing where the marks go.