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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 599 · 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 water tank holds 4240 litres. 30% of the water is used. How many litres are left?
  2. 2.A town has 1940 people. Its population grows by 10%. How many people live there now?
  3. 3.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  4. 4.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹2420 to ₹1210. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹3760 to ₹1880. By what percent did it come down?
  7. 7.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹3540 to ₹2478. By what percent did it come down?
  9. 9.A water tank holds 660 litres. 30% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹2280 to ₹3192. By what percent did it go up?
  11. 11.A water tank holds 4180 litres. 50% of the water is used. How many litres are left?
  12. 12.A water tank holds 300 litres. 5% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹1460 to ₹1606. By what percent did it go up?
  14. 14.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  15. 15.A shop sells 3620 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  16. 16.A shop sells 700 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  17. 17.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  18. 18.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  19. 19.The price of a bicycle is ₹820. It goes up by 30%. What is the new price (in ₹)?
  20. 20.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  21. 21.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  22. 22.The price of a bicycle is ₹4380. It goes up by 20%. What is the new price (in ₹)?
  23. 23.A water tank holds 2460 litres. 5% of the water is used. How many litres are left?
  24. 24.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  25. 25.A shop sells 2000 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  26. 26.The price of a school bag changes from ₹480 to ₹552. By what percent did it go up?
  27. 27.A shop sells 880 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  28. 28.A town has 4060 people. Its population grows by 10%. How many people live there now?
  29. 29.The price of a bicycle is ₹3220. It goes up by 10%. What is the new price (in ₹)?
  30. 30.The price of a school bag changes from ₹1360 to ₹1156. By what percent did it come down?
  31. 31.A town has 1560 people. Its population grows by 10%. How many people live there now?
  32. 32.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  33. 33.A water tank holds 4700 litres. 5% of the water is used. How many litres are left?
  34. 34.A town has 2460 people. Its population grows by 10%. How many people live there now?
  35. 35.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  36. 36.The price of a school bag changes from ₹180 to ₹234. By what percent did it go up?
  37. 37.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  38. 38.A water tank holds 2560 litres. 20% of the water is used. How many litres are left?
  39. 39.A town has 2020 people. Its population grows by 10%. How many people live there now?
  40. 40.The price of a school bag changes from ₹1000 to ₹1250. By what percent did it go up?

Answer key

  1. 2968
  2. 2134
  3. 87.5
  4. 65
  5. 50
  6. 50
  7. 15.5
  8. 30
  9. 462
  10. 40
  11. 2090
  12. 285
  13. 10
  14. 24
  15. 3982
  16. 875
  17. 26
  18. 70
  19. 1066
  20. 49.5
  21. 110
  22. 5256
  23. 2337
  24. 60
  25. 2100
  26. 15
  27. 968
  28. 4466
  29. 3542
  30. 15
  31. 1716
  32. 28
  33. 4465
  34. 2706
  35. 12.5
  36. 30
  37. 38
  38. 2048
  39. 2222
  40. 25

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