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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 159 · 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 town has 4920 people. Its population grows by 50%. How many people live there now?
  2. 2.A water tank holds 240 litres. 50% of the water is used. How many litres are left?
  3. 3.The price of a bicycle is ₹2200. It goes up by 25%. What is the new price (in ₹)?
  4. 4.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹1380 to ₹828. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹1760 to ₹1408. By what percent did it come down?
  7. 7.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹100 to ₹95. By what percent did it come down?
  9. 9.A water tank holds 880 litres. 30% of the water is used. How many litres are left?
  10. 10.A water tank holds 980 litres. 30% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹1260 to ₹1323. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹660 to ₹990. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹1540 to ₹1232. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹4840 to ₹3872. By what percent did it come down?
  15. 15.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  16. 16.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹420 to ₹399. By what percent did it come down?
  18. 18.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  19. 19.A water tank holds 1700 litres. 30% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹2860 to ₹3575. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹4300 to ₹2150. By what percent did it come down?
  22. 22.A town has 3420 people. Its population grows by 25%. How many people live there now?
  23. 23.The price of a school bag changes from ₹2760 to ₹1380. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹4100 to ₹4510. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹3400 to ₹2380. By what percent did it come down?
  26. 26.A water tank holds 900 litres. 25% of the water is used. How many litres are left?
  27. 27.A water tank holds 1360 litres. 50% of the water is used. How many litres are left?
  28. 28.A water tank holds 2000 litres. 25% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹3820 to ₹4011. By what percent did it go up?
  30. 30.A water tank holds 1660 litres. 10% of the water is used. How many litres are left?
  31. 31.The price of a bicycle is ₹4840. It goes up by 5%. What is the new price (in ₹)?
  32. 32.A town has 600 people. Its population grows by 25%. How many people live there now?
  33. 33.The price of a school bag changes from ₹940 to ₹1034. By what percent did it go up?
  34. 34.The price of a bicycle is ₹4940. It goes up by 50%. What is the new price (in ₹)?
  35. 35.A water tank holds 160 litres. 20% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹3580 to ₹3401. By what percent did it come down?
  37. 37.A water tank holds 3060 litres. 40% of the water is used. How many litres are left?
  38. 38.A water tank holds 480 litres. 10% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹4780 to ₹5975. By what percent did it go up?
  40. 40.A town has 580 people. Its population grows by 15%. How many people live there now?

Answer key

  1. 7380
  2. 120
  3. 2750
  4. 32
  5. 40
  6. 20
  7. 68
  8. 5
  9. 616
  10. 686
  11. 5
  12. 50
  13. 20
  14. 20
  15. 52.5
  16. 125
  17. 5
  18. 33.5
  19. 1190
  20. 25
  21. 50
  22. 4275
  23. 50
  24. 10
  25. 30
  26. 675
  27. 680
  28. 1500
  29. 5
  30. 1494
  31. 5082
  32. 750
  33. 10
  34. 7410
  35. 128
  36. 5
  37. 1836
  38. 432
  39. 25
  40. 667

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