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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 420 · 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.The price of a school bag changes from ₹3640 to ₹5096. By what percent did it go up?
  2. 2.The price of a school bag changes from ₹960 to ₹672. By what percent did it come down?
  3. 3.A water tank holds 1760 litres. 50% of the water is used. How many litres are left?
  4. 4.A water tank holds 2440 litres. 10% of the water is used. How many litres are left?
  5. 5.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  6. 6.A town has 4620 people. Its population grows by 30%. How many people live there now?
  7. 7.The price of a school bag changes from ₹4340 to ₹3038. By what percent did it come down?
  8. 8.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  9. 9.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  10. 10.A water tank holds 1980 litres. 40% of the water is used. How many litres are left?
  11. 11.A water tank holds 4980 litres. 10% of the water is used. How many litres are left?
  12. 12.A shop sells 4840 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  13. 13.The price of a bicycle is ₹780. It goes up by 10%. What is the new price (in ₹)?
  14. 14.A water tank holds 1940 litres. 10% of the water is used. How many litres are left?
  15. 15.A town has 3760 people. Its population grows by 30%. How many people live there now?
  16. 16.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹3480 to ₹4350. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹4280 to ₹5350. By what percent did it go up?
  19. 19.A town has 420 people. Its population grows by 20%. How many people live there now?
  20. 20.The price of a school bag changes from ₹3080 to ₹4312. By what percent did it go up?
  21. 21.A water tank holds 80 litres. 40% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹3620 to ₹4525. By what percent did it go up?
  23. 23.A shop sells 4700 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹4420 to ₹6630. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹2960 to ₹3552. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹1220 to ₹1281. By what percent did it go up?
  27. 27.A water tank holds 900 litres. 25% of the water is used. How many litres are left?
  28. 28.A shop sells 2160 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 ₹3720. It goes up by 15%. What is the new price (in ₹)?
  30. 30.A town has 960 people. Its population grows by 15%. How many people live there now?
  31. 31.The price of a school bag changes from ₹1140 to ₹798. By what percent did it come down?
  32. 32.A water tank holds 1460 litres. 30% of the water is used. How many litres are left?
  33. 33.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹4480 to ₹6720. By what percent did it go up?
  35. 35.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  36. 36.The price of a school bag changes from ₹140 to ₹133. By what percent did it come down?
  37. 37.A town has 740 people. Its population grows by 20%. How many people live there now?
  38. 38.A shop sells 440 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  39. 39.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  40. 40.A water tank holds 2440 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 40
  2. 30
  3. 880
  4. 2196
  5. 58
  6. 6006
  7. 30
  8. 55
  9. 40
  10. 1188
  11. 4482
  12. 5324
  13. 858
  14. 1746
  15. 4888
  16. 5
  17. 25
  18. 25
  19. 504
  20. 40
  21. 48
  22. 25
  23. 5170
  24. 50
  25. 20
  26. 5
  27. 675
  28. 2376
  29. 4278
  30. 1104
  31. 30
  32. 1022
  33. 82
  34. 50
  35. 68
  36. 5
  37. 888
  38. 506
  39. 65
  40. 1708

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