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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 428 · 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 shop sells 180 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  2. 2.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹4020 to ₹3216. By what percent did it come down?
  4. 4.A shop sells 1400 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  5. 5.A water tank holds 3840 litres. 30% of the water is used. How many litres are left?
  6. 6.A town has 120 people. Its population grows by 30%. How many people live there now?
  7. 7.The price of a school bag changes from ₹940 to ₹658. By what percent did it come down?
  8. 8.A town has 760 people. Its population grows by 40%. How many people live there now?
  9. 9.The price of a bicycle is ₹2560. It goes up by 25%. What is the new price (in ₹)?
  10. 10.A water tank holds 940 litres. 20% of the water is used. How many litres are left?
  11. 11.A water tank holds 4620 litres. 10% of the water is used. How many litres are left?
  12. 12.The price of a bicycle is ₹4400. It goes up by 10%. What is the new price (in ₹)?
  13. 13.A water tank holds 4980 litres. 20% of the water is used. How many litres are left?
  14. 14.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  15. 15.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  16. 16.A water tank holds 1580 litres. 40% of the water is used. How many litres are left?
  17. 17.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹3780 to ₹3969. By what percent did it go up?
  19. 19.A water tank holds 200 litres. 25% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹120 to ₹132. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹2080 to ₹1976. By what percent did it come down?
  22. 22.A water tank holds 4740 litres. 50% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹1940. It goes up by 40%. What is the new price (in ₹)?
  24. 24.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  25. 25.The price of a bicycle is ₹4380. It goes up by 50%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹4720 to ₹3540. By what percent did it come down?
  27. 27.The price of a bicycle is ₹860. It goes up by 25%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹3560 to ₹4272. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹1480 to ₹740. By what percent did it come down?
  30. 30.A water tank holds 1660 litres. 15% of the water is used. How many litres are left?
  31. 31.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  32. 32.A water tank holds 4880 litres. 20% of the water is used. How many litres are left?
  33. 33.A town has 440 people. Its population grows by 25%. How many people live there now?
  34. 34.A town has 2340 people. Its population grows by 5%. How many people live there now?
  35. 35.The price of a bicycle is ₹1060. It goes up by 30%. What is the new price (in ₹)?
  36. 36.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  37. 37.A water tank holds 480 litres. 40% of the water is used. How many litres are left?
  38. 38.A water tank holds 1020 litres. 15% of the water is used. How many litres are left?
  39. 39.The price of a bicycle is ₹320. It goes up by 40%. What is the new price (in ₹)?
  40. 40.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =

Answer key

  1. 225
  2. 4.5
  3. 20
  4. 1750
  5. 2688
  6. 156
  7. 30
  8. 1064
  9. 3200
  10. 752
  11. 4158
  12. 4840
  13. 3984
  14. 125
  15. 9.75
  16. 948
  17. 15.5
  18. 5
  19. 150
  20. 10
  21. 5
  22. 2370
  23. 2716
  24. 32
  25. 6570
  26. 25
  27. 1075
  28. 20
  29. 50
  30. 1411
  31. 27.75
  32. 3904
  33. 550
  34. 2457
  35. 1378
  36. 19.25
  37. 288
  38. 867
  39. 448
  40. 68

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