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Published: 28/04/2020
4 pages

Percentage and AER calculations

A Core maths worksheet to practise simple and compound interest calculations, calculated annually, monthly or quarterly, and to test understanding of what annual equivalent interest rate measures.


£5000 is invested in 4 different accounts paying 3.8% per annum (p.a.) interest.

1) 3.8% p.a. simple interest

  1. Calculate the interest earned after 1 year.
  2. Calculate the total amount in the account after 1 year.
  3. Calculate the total amount in the account after 7 years.
  4. Calculate the total interest earned after 7 years.
  5. How long would it take for the investment to double in value?

5) Calculate the AER for 3.8% p.a. compound interest paid quarterly.


See other resources: Number | AQA | Percentages – compound percentages

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