Liam invests $800 {\char"24} 800\,$800 for 5 years in a savings account. The account pays simple interest at a rate of 2% per year. Work out the total interest Liam has earned at the end of 5 years.
199 exam-style questions on OCR GCSE Maths Percentages. Each one has a worked solution and a mark scheme showing where the marks go.