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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 549 · 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 ₹4920 to ₹5658. By what percent did it go up?
  2. 2.A water tank holds 840 litres. 10% of the water is used. How many litres are left?
  3. 3.The price of a bicycle is ₹1720. It goes up by 15%. What is the new price (in ₹)?
  4. 4.A town has 4800 people. Its population grows by 15%. How many people live there now?
  5. 5.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  6. 6.A water tank holds 400 litres. 5% of the water is used. How many litres are left?
  7. 7.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  8. 8.A water tank holds 3140 litres. 5% of the water is used. How many litres are left?
  9. 9.The price of a bicycle is ₹4780. It goes up by 15%. What is the new price (in ₹)?
  10. 10.A town has 4640 people. Its population grows by 5%. How many people live there now?
  11. 11.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  12. 12.A water tank holds 3940 litres. 5% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹2780 to ₹2919. By what percent did it go up?
  14. 14.The price of a bicycle is ₹3100. It goes up by 10%. What is the new price (in ₹)?
  15. 15.The price of a bicycle is ₹2360. It goes up by 40%. What is the new price (in ₹)?
  16. 16.A town has 1600 people. Its population grows by 25%. How many people live there now?
  17. 17.The price of a school bag changes from ₹4140 to ₹2484. By what percent did it come down?
  18. 18.A water tank holds 3140 litres. 20% of the water is used. How many litres are left?
  19. 19.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  20. 20.A town has 3200 people. Its population grows by 40%. How many people live there now?
  21. 21.A shop sells 700 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  22. 22.A town has 4880 people. Its population grows by 10%. How many people live there now?
  23. 23.The price of a school bag changes from ₹1540 to ₹1078. By what percent did it come down?
  24. 24.A town has 2800 people. Its population grows by 50%. How many people live there now?
  25. 25.A town has 4720 people. Its population grows by 10%. How many people live there now?
  26. 26.The price of a bicycle is ₹780. It goes up by 20%. What is the new price (in ₹)?
  27. 27.The price of a school bag changes from ₹120 to ₹90. By what percent did it come down?
  28. 28.A water tank holds 1460 litres. 30% of the water is used. How many litres are left?
  29. 29.A water tank holds 3900 litres. 20% of the water is used. How many litres are left?
  30. 30.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹4940 to ₹6916. By what percent did it go up?
  32. 32.A water tank holds 1600 litres. 50% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹780 to ₹1014. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹2580 to ₹1548. By what percent did it come down?
  35. 35.A town has 4880 people. Its population grows by 30%. How many people live there now?
  36. 36.A town has 280 people. Its population grows by 25%. How many people live there now?
  37. 37.A town has 1560 people. Its population grows by 5%. How many people live there now?
  38. 38.A town has 4480 people. Its population grows by 15%. How many people live there now?
  39. 39.A water tank holds 3960 litres. 25% of the water is used. How many litres are left?
  40. 40.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =

Answer key

  1. 15
  2. 756
  3. 1978
  4. 5520
  5. 37.5
  6. 380
  7. 46
  8. 2983
  9. 5497
  10. 4872
  11. 43
  12. 3743
  13. 5
  14. 3410
  15. 3304
  16. 2000
  17. 40
  18. 2512
  19. 27.75
  20. 4480
  21. 980
  22. 5368
  23. 30
  24. 4200
  25. 5192
  26. 936
  27. 25
  28. 1022
  29. 3120
  30. 21
  31. 40
  32. 800
  33. 30
  34. 40
  35. 6344
  36. 350
  37. 1638
  38. 5152
  39. 2970
  40. 19.25

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