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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 671 · 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 price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  2. 2.A town has 2600 people. Its population grows by 15%. How many people live there now?
  3. 3.A water tank holds 4420 litres. 20% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹4440 to ₹6216. By what percent did it go up?
  5. 5.A town has 4960 people. Its population grows by 40%. How many people live there now?
  6. 6.The price of a bicycle is ₹4200. It goes up by 50%. What is the new price (in ₹)?
  7. 7.A water tank holds 180 litres. 50% of the water is used. How many litres are left?
  8. 8.A shop sells 3840 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹3840 to ₹4608. By what percent did it go up?
  10. 10.A shop sells 3340 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  11. 11.The price of a school bag changes from ₹3700 to ₹2775. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹400 to ₹460. By what percent did it go up?
  13. 13.A water tank holds 3480 litres. 15% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹100 to ₹105. By what percent did it go up?
  15. 15.The price of a bicycle is ₹220. It goes up by 40%. What is the new price (in ₹)?
  16. 16.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹3740 to ₹4114. By what percent did it go up?
  18. 18.A town has 1100 people. Its population grows by 15%. How many people live there now?
  19. 19.The price of a school bag changes from ₹1320 to ₹1188. By what percent did it come down?
  20. 20.A water tank holds 1340 litres. 30% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹2560. It goes up by 25%. What is the new price (in ₹)?
  22. 22.A shop sells 1700 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  23. 23.The price of a school bag changes from ₹1220 to ₹1464. By what percent did it go up?
  24. 24.The price of a bicycle is ₹4080. It goes up by 30%. What is the new price (in ₹)?
  25. 25.A water tank holds 2060 litres. 15% of the water is used. How many litres are left?
  26. 26.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  27. 27.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  28. 28.A town has 2480 people. Its population grows by 50%. How many people live there now?
  29. 29.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  30. 30.A shop sells 2720 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  31. 31.The price of a bicycle is ₹980. It goes up by 40%. What is the new price (in ₹)?
  32. 32.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  33. 33.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.The price of a bicycle is ₹3880. It goes up by 50%. What is the new price (in ₹)?
  35. 35.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 4440 litres. 25% of the water is used. How many litres are left?
  37. 37.A water tank holds 4300 litres. 15% of the water is used. How many litres are left?
  38. 38.A water tank holds 680 litres. 25% of the water is used. How many litres are left?
  39. 39.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  40. 40.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =

Answer key

  1. 23.5
  2. 2990
  3. 3536
  4. 40
  5. 6944
  6. 6300
  7. 90
  8. 5376
  9. 20
  10. 3507
  11. 25
  12. 15
  13. 2958
  14. 5
  15. 308
  16. 23.5
  17. 10
  18. 1265
  19. 10
  20. 938
  21. 3200
  22. 2040
  23. 20
  24. 5304
  25. 1751
  26. 49
  27. 17
  28. 3720
  29. 37.5
  30. 3400
  31. 1372
  32. 87.5
  33. 87.5
  34. 5820
  35. 21
  36. 3330
  37. 3655
  38. 510
  39. 32
  40. 60

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