Answer all 15 questions. Show all working. Marks are shown in brackets for each question.

1. Calculate 23% of 840.

   [1 mark]

2. Increase £560 by 14%.

   [1 mark]

3. Decrease £1,200 by 17.5%.

   [1 mark]

4. A laptop is bought for £650 and sold for £507. Calculate the percentage loss.

   [2 marks]

5. A jacket costs £84 including VAT at 20%. Calculate the price of the jacket before VAT.

   [2 marks]

6. After a 12% pay rise, Priya earns £3,024 per month. What was her monthly salary before the pay rise?

   [2 marks]

7. A television is reduced by 35% in a sale. The sale price is £292.50. What was the original price?

   [2 marks]

8. Express £34 profit on a cost price of £136 as a percentage profit.

   [1 mark]

9. A car was bought for £15,000. In the first year it depreciated by 18% and in the second year by 12%. What was the value of the car after two years?

   [3 marks]

10. A house price increases by 6% per year for 4 years. If the house is worth £220,000 now, what will it be worth in 4 years? Give your answer to the nearest pound.

    [3 marks]

11. Nina invests £4,500 at a compound interest rate of 2.5% per year. How much interest does she earn in total after 3 years? Give your answer to the nearest penny.

    [3 marks]

12. A shop buys phones for £180 each and sells them for £261. Calculate the percentage profit.

    [2 marks]

13. An item is sold for £345 after a 15% increase. What was the original price?

    [2 marks]

14. Sam's electricity bill is £95 per month. It rises by 8% in April and then by a further 5% in October. What is Sam's monthly bill after both increases? Give your answer to the nearest penny.

    [3 marks]

15. A population of bacteria doubles in size and then decreases by 40%. Express the overall change as a percentage increase or decrease from the original population.

    [3 marks]

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