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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 210 · 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 price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  2. 2.A shop sells 620 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  3. 3.The price of a school bag changes from ₹4960 to ₹6448. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹1380 to ₹1242. By what percent did it come down?
  5. 5.A water tank holds 2640 litres. 40% of the water is used. How many litres are left?
  6. 6.A water tank holds 4000 litres. 30% of the water is used. How many litres are left?
  7. 7.A water tank holds 820 litres. 15% of the water is used. How many litres are left?
  8. 8.A water tank holds 620 litres. 10% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹900 to ₹1035. By what percent did it go up?
  10. 10.The price of a bicycle is ₹1740. It goes up by 5%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹4760 to ₹4522. By what percent did it come down?
  12. 12.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  13. 13.The price of a bicycle is ₹5000. It goes up by 40%. What is the new price (in ₹)?
  14. 14.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  15. 15.A water tank holds 4180 litres. 15% of the water is used. How many litres are left?
  16. 16.A town has 2240 people. Its population grows by 5%. How many people live there now?
  17. 17.The price of a bicycle is ₹4980. It goes up by 50%. What is the new price (in ₹)?
  18. 18.The price of a bicycle is ₹1060. It goes up by 5%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹460 to ₹690. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹4380 to ₹5475. By what percent did it go up?
  21. 21.The price of a bicycle is ₹340. It goes up by 30%. What is the new price (in ₹)?
  22. 22.The price of a bicycle is ₹4920. It goes up by 20%. What is the new price (in ₹)?
  23. 23.The price of a school bag changes from ₹3840 to ₹2688. By what percent did it come down?
  24. 24.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  25. 25.A town has 2800 people. Its population grows by 25%. How many people live there now?
  26. 26.The price of a school bag changes from ₹300 to ₹330. By what percent did it go up?
  27. 27.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  28. 28.A water tank holds 340 litres. 40% of the water is used. How many litres are left?
  29. 29.A water tank holds 5000 litres. 5% of the water is used. How many litres are left?
  30. 30.A shop sells 2960 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  31. 31.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.The price of a school bag changes from ₹440 to ₹528. By what percent did it go up?
  33. 33.A water tank holds 1260 litres. 5% of the water is used. How many litres are left?
  34. 34.A shop sells 2220 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  35. 35.The price of a school bag changes from ₹340 to ₹425. By what percent did it go up?
  36. 36.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  37. 37.The price of a bicycle is ₹4040. It goes up by 30%. What is the new price (in ₹)?
  38. 38.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹4660 to ₹4427. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹3880 to ₹4074. By what percent did it go up?

Answer key

  1. 65
  2. 806
  3. 30
  4. 10
  5. 1584
  6. 2800
  7. 697
  8. 558
  9. 15
  10. 1827
  11. 5
  12. 95
  13. 7000
  14. 31.25
  15. 3553
  16. 2352
  17. 7470
  18. 1113
  19. 50
  20. 25
  21. 442
  22. 5904
  23. 30
  24. 52
  25. 3500
  26. 10
  27. 28.75
  28. 204
  29. 4750
  30. 3848
  31. 33.5
  32. 20
  33. 1197
  34. 2664
  35. 25
  36. 96
  37. 5252
  38. 37.5
  39. 5
  40. 5

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