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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 23 · 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 ₹4680 to ₹5616. By what percent did it go up?
  2. 2.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  3. 3.A water tank holds 180 litres. 5% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹4040 to ₹3434. By what percent did it come down?
  5. 5.A shop sells 3120 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  6. 6.A water tank holds 1440 litres. 10% of the water is used. How many litres are left?
  7. 7.A town has 2900 people. Its population grows by 30%. How many people live there now?
  8. 8.A water tank holds 1580 litres. 40% of the water is used. How many litres are left?
  9. 9.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 3560 litres. 25% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹3760 to ₹3196. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹4420 to ₹6188. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹3720 to ₹3906. By what percent did it go up?
  14. 14.The price of a bicycle is ₹2460. It goes up by 15%. What is the new price (in ₹)?
  15. 15.A shop sells 440 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  16. 16.The price of a school bag changes from ₹920 to ₹966. By what percent did it go up?
  17. 17.A town has 3840 people. Its population grows by 5%. How many people live there now?
  18. 18.A town has 580 people. Its population grows by 5%. How many people live there now?
  19. 19.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  20. 20.The price of a school bag changes from ₹4900 to ₹3675. By what percent did it come down?
  21. 21.The price of a bicycle is ₹2960. It goes up by 50%. What is the new price (in ₹)?
  22. 22.A water tank holds 4460 litres. 20% of the water is used. How many litres are left?
  23. 23.A water tank holds 2960 litres. 40% of the water is used. How many litres are left?
  24. 24.A water tank holds 3820 litres. 50% of the water is used. How many litres are left?
  25. 25.A town has 3060 people. Its population grows by 25%. How many people live there now?
  26. 26.A water tank holds 3720 litres. 25% of the water is used. How many litres are left?
  27. 27.A water tank holds 3600 litres. 40% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹4380. It goes up by 20%. What is the new price (in ₹)?
  29. 29.A shop sells 1540 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹880 to ₹836. By what percent did it come down?
  31. 31.The price of a bicycle is ₹3340. It goes up by 25%. What is the new price (in ₹)?
  32. 32.A water tank holds 3140 litres. 30% of the water is used. How many litres are left?
  33. 33.A town has 4980 people. Its population grows by 30%. How many people live there now?
  34. 34.A water tank holds 2280 litres. 50% of the water is used. How many litres are left?
  35. 35.A water tank holds 3360 litres. 30% of the water is used. How many litres are left?
  36. 36.A town has 2820 people. Its population grows by 40%. How many people live there now?
  37. 37.A price comes down by 30% and then comes down by 20% more. By what percent has it come down in all? =
  38. 38.A water tank holds 1300 litres. 5% of the water is used. How many litres are left?
  39. 39.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 1740 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 20
  2. 40.5
  3. 171
  4. 15
  5. 3432
  6. 1296
  7. 3770
  8. 948
  9. 72.5
  10. 2670
  11. 15
  12. 40
  13. 5
  14. 2829
  15. 572
  16. 5
  17. 4032
  18. 609
  19. 52.5
  20. 25
  21. 4440
  22. 3568
  23. 1776
  24. 1910
  25. 3825
  26. 2790
  27. 2160
  28. 5256
  29. 1848
  30. 5
  31. 4175
  32. 2198
  33. 6474
  34. 1140
  35. 2352
  36. 3948
  37. 44
  38. 1235
  39. 61
  40. 1566

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