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Readnary · Original practice

Percentages and exponential change

Practice worksheet

AI-assisted practice — not independently academically reviewed. Answers may contain errors; check important results against your course materials.

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Name: __________________________ Date: __________________

1. Find 18% of 350.

  1. 53
  2. 63
  3. 68
  4. 72

2. Express 84 as a percentage of 120.

  1. 60%
  2. 70%
  3. 72%
  4. 142.9%

3. Express 96 as a percentage of 80.

  1. 83.3%
  2. 116%
  3. 120%
  4. 176%

4. Increase MVR 640 by 12.5%.

  1. MVR 652.50
  2. MVR 700
  3. MVR 720
  4. MVR 800

5. Decrease MVR 1250 by 18%.

  1. MVR 1000
  2. MVR 1025
  3. MVR 1070
  4. MVR 1225

6. Which multiplier represents a decrease of 7%?

  1. 0.07
  2. 0.93
  3. 1.07
  4. 1.70

7. A quantity rises from 480 to 600. What is the percentage increase?

  1. 20%
  2. 25%
  3. 80%
  4. 125%

8. A price falls from MVR 840 to MVR 714. What is the percentage decrease?

  1. 12.6%
  2. 15%
  3. 17.6%
  4. 85%

9. An item costs MVR 240 and sells for MVR 294. What is the profit percentage on cost?

  1. 18.4%
  2. 20%
  3. 22.5%
  4. 54%

10. An item costing MVR 600 is sold for MVR 540. What is the loss percentage on cost?

  1. 9%
  2. 10%
  3. 11.1%
  4. 90%

11. A bag costs MVR 384 after a 20% discount. What was its original price?

  1. MVR 460.80
  2. MVR 480
  3. MVR 499.20
  4. MVR 768

12. After a 15% increase, a fee is MVR 690. What was the fee before the increase?

  1. MVR 586.50
  2. MVR 600
  3. MVR 615
  4. MVR 793.50

13. A trader sells an item for MVR 672 after making a 12% profit on cost. Find the cost price.

  1. MVR 591.36
  2. MVR 600
  3. MVR 620
  4. MVR 752.64

14. A population is 325 after a 35% decrease. What was the original population?

  1. 211.25
  2. 438.75
  3. 500
  4. 928.6

15. Find the simple interest on MVR 2500 at 6.4% per year for 3 years.

  1. MVR 160
  2. MVR 320
  3. MVR 480
  4. MVR 2980

16. MVR 1800 earns 4.5% simple interest per year for 5 years. What is the final amount?

  1. MVR 405
  2. MVR 1881
  3. MVR 2025
  4. MVR 2205

17. MVR 2000 is invested at 5% compound interest per year for 3 years. Find the final amount.

  1. MVR 2150
  2. MVR 2300
  3. MVR 2315.25
  4. MVR 10 500

18. For MVR 1000 invested at 10% per year for 2 years, how much more interest does annual compound interest earn than simple interest?

  1. MVR 0
  2. MVR 10
  3. MVR 20
  4. MVR 100

19. A population of 12 500 grows by 4% each year. What is the population after 2 years according to this model?

  1. 13 000
  2. 13 500
  3. 13 520
  4. 14 580

20. A culture starts with 320 cells and doubles at the end of each hour. How many cells are modelled after 3 hours?

  1. 960
  2. 1280
  3. 1920
  4. 2560

21. A vehicle worth MVR 28 000 depreciates by 15% each year. What is its value after 2 years?

  1. MVR 19 600
  2. MVR 20 230
  3. MVR 23 800
  4. MVR 32 200

22. A quantity of 6400 decreases by 30% in each period. What remains after 3 periods?

  1. 640
  2. 1881.6
  3. 1920
  4. 2195.2

23. A value of 1000 increases by 20% and then decreases by 20%. What is the final value?

  1. 800
  2. 960
  3. 1000
  4. 1040

24. Which expression models an initial population of 80 000 decreasing by 1.5% per year for n years?

  1. 80 000(0.015)^n
  2. 80 000(0.985)^n
  3. 80 000(1.015)^n
  4. 80 000 − 0.985n

Published revision 3 · 2026-09-08 · Not an official exam paper.