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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 462 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.A town has 1960 people. Its population grows by 5%. How many people live there now?
  2. 2.A water tank holds 4480 litres. 50% of the water is used. How many litres are left?
  3. 3.A shop sells 3160 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  4. 4.A water tank holds 1880 litres. 15% of the water is used. How many litres are left?
  5. 5.A town has 1340 people. Its population grows by 30%. How many people live there now?
  6. 6.The price of a school bag changes from ₹1380 to ₹1587. By what percent did it go up?
  7. 7.A water tank holds 2600 litres. 50% of the water is used. How many litres are left?
  8. 8.A water tank holds 2700 litres. 40% of the water is used. How many litres are left?
  9. 9.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  10. 10.The price of a bicycle is ₹4880. It goes up by 40%. What is the new price (in ₹)?
  11. 11.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  12. 12.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹2200 to ₹2750. By what percent did it go up?
  14. 14.A shop sells 2620 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  15. 15.A water tank holds 3220 litres. 25% of the water is used. How many litres are left?
  16. 16.A water tank holds 240 litres. 5% of the water is used. How many litres are left?
  17. 17.A water tank holds 1620 litres. 5% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹680 to ₹748. By what percent did it go up?
  19. 19.A shop sells 2280 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  20. 20.A town has 2740 people. Its population grows by 5%. How many people live there now?
  21. 21.A shop sells 120 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  22. 22.A water tank holds 1920 litres. 15% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹3260 to ₹2934. By what percent did it come down?
  24. 24.A town has 1880 people. Its population grows by 30%. How many people live there now?
  25. 25.The price of a school bag changes from ₹3480 to ₹4872. By what percent did it go up?
  26. 26.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  27. 27.A water tank holds 2060 litres. 25% of the water is used. How many litres are left?
  28. 28.A shop sells 4340 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  29. 29.The price of a bicycle is ₹620. It goes up by 20%. What is the new price (in ₹)?
  30. 30.A water tank holds 1120 litres. 10% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹3200 to ₹4000. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹4820 to ₹4338. By what percent did it come down?
  33. 33.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹3360 to ₹3528. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹240 to ₹312. By what percent did it go up?
  36. 36.A town has 1940 people. Its population grows by 50%. How many people live there now?
  37. 37.The price of a school bag changes from ₹2180 to ₹2725. By what percent did it go up?
  38. 38.A water tank holds 880 litres. 25% of the water is used. How many litres are left?
  39. 39.A town has 1940 people. Its population grows by 5%. How many people live there now?
  40. 40.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =

Answer key

  1. 2058
  2. 2240
  3. 3950
  4. 1598
  5. 1742
  6. 15
  7. 1300
  8. 1620
  9. 9.25
  10. 6832
  11. 43.75
  12. 87.5
  13. 25
  14. 2882
  15. 2415
  16. 228
  17. 1539
  18. 10
  19. 2508
  20. 2877
  21. 156
  22. 1632
  23. 10
  24. 2444
  25. 40
  26. 26
  27. 1545
  28. 4774
  29. 744
  30. 1008
  31. 25
  32. 10
  33. 31.25
  34. 5
  35. 30
  36. 2910
  37. 25
  38. 660
  39. 2037
  40. 14.5

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