Charlie invests £5000 for 4 years in a savings account. She gets 4% per annum compound interest in the first 2 years, then x% x\%\,x% per annum compound interest for 2 years.
Charlie has £5681.78 at the end of 4 years, work out the value of xxx.
208 exam-style questions on Eduqas GCSE Maths Repeated Percentage Change. Each one has a worked solution and a mark scheme showing where the marks go.