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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 46 · 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 ₹180 to ₹108. By what percent did it come down?
  2. 2.The price of a school bag changes from ₹2080 to ₹1040. By what percent did it come down?
  3. 3.The price of a school bag changes from ₹3440 to ₹2924. By what percent did it come down?
  4. 4.A water tank holds 3680 litres. 5% of the water is used. How many litres are left?
  5. 5.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  6. 6.A water tank holds 1860 litres. 20% of the water is used. How many litres are left?
  7. 7.A water tank holds 3140 litres. 40% of the water is used. How many litres are left?
  8. 8.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹720 to ₹432. By what percent did it come down?
  10. 10.A water tank holds 1880 litres. 10% of the water is used. How many litres are left?
  11. 11.A water tank holds 380 litres. 25% of the water is used. How many litres are left?
  12. 12.A water tank holds 4420 litres. 50% of the water is used. How many litres are left?
  13. 13.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  14. 14.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  15. 15.The price of a bicycle is ₹580. It goes up by 40%. What is the new price (in ₹)?
  16. 16.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  17. 17.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  19. 19.The price of a school bag changes from ₹4820 to ₹6748. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹740 to ₹851. By what percent did it go up?
  21. 21.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  22. 22.A water tank holds 3820 litres. 5% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹4960. It goes up by 20%. What is the new price (in ₹)?
  24. 24.A town has 4240 people. Its population grows by 20%. How many people live there now?
  25. 25.The price of a bicycle is ₹2900. It goes up by 50%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹380 to ₹570. By what percent did it go up?
  27. 27.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  28. 28.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  29. 29.A town has 1320 people. Its population grows by 50%. How many people live there now?
  30. 30.A water tank holds 3200 litres. 20% of the water is used. How many litres are left?
  31. 31.A water tank holds 1260 litres. 25% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹420 to ₹210. By what percent did it come down?
  33. 33.A town has 3940 people. Its population grows by 40%. How many people live there now?
  34. 34.A water tank holds 1180 litres. 50% of the water is used. How many litres are left?
  35. 35.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  36. 36.The price of a bicycle is ₹2060. It goes up by 40%. What is the new price (in ₹)?
  37. 37.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹1500 to ₹2100. By what percent did it go up?
  39. 39.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹4980 to ₹7470. By what percent did it go up?

Answer key

  1. 40
  2. 50
  3. 15
  4. 3496
  5. 43
  6. 1488
  7. 1884
  8. 54
  9. 40
  10. 1692
  11. 285
  12. 2210
  13. 37
  14. 28.75
  15. 812
  16. 23.5
  17. 31.25
  18. 44
  19. 40
  20. 15
  21. 28.75
  22. 3629
  23. 5952
  24. 5088
  25. 4350
  26. 50
  27. 36.5
  28. 110
  29. 1980
  30. 2560
  31. 945
  32. 50
  33. 5516
  34. 590
  35. 54
  36. 2884
  37. 37.5
  38. 40
  39. 20
  40. 50

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