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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 838 · 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 bicycle is ₹100. It goes up by 5%. What is the new price (in ₹)?
  2. 2.The price of a school bag changes from ₹3900 to ₹3705. By what percent did it come down?
  3. 3.The price of a school bag changes from ₹960 to ₹1344. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹4680 to ₹3510. By what percent did it come down?
  5. 5.A water tank holds 4140 litres. 10% of the water is used. How many litres are left?
  6. 6.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  7. 7.A water tank holds 4300 litres. 15% of the water is used. How many litres are left?
  8. 8.A water tank holds 220 litres. 50% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹1540 to ₹1694. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹1520 to ₹1976. By what percent did it go up?
  11. 11.A water tank holds 340 litres. 20% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹4760 to ₹5474. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹3680 to ₹4416. By what percent did it go up?
  14. 14.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  15. 15.The price of a school bag changes from ₹1240 to ₹1860. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹1560 to ₹1872. By what percent did it go up?
  17. 17.A town has 2840 people. Its population grows by 15%. How many people live there now?
  18. 18.A water tank holds 2520 litres. 15% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹660 to ₹627. By what percent did it come down?
  20. 20.The price of a school bag changes from ₹60 to ₹51. By what percent did it come down?
  21. 21.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  22. 22.The price of a bicycle is ₹1380. It goes up by 20%. What is the new price (in ₹)?
  23. 23.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  24. 24.The price of a bicycle is ₹3860. It goes up by 30%. What is the new price (in ₹)?
  25. 25.A water tank holds 3580 litres. 30% of the water is used. How many litres are left?
  26. 26.The price of a bicycle is ₹1840. It goes up by 30%. What is the new price (in ₹)?
  27. 27.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  28. 28.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 80 litres. 20% of the water is used. How many litres are left?
  30. 30.A water tank holds 380 litres. 10% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹3820 to ₹4011. By what percent did it go up?
  32. 32.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  33. 33.The price of a bicycle is ₹2100. It goes up by 30%. What is the new price (in ₹)?
  34. 34.The price of a bicycle is ₹4440. It goes up by 15%. What is the new price (in ₹)?
  35. 35.The price of a bicycle is ₹4040. It goes up by 5%. What is the new price (in ₹)?
  36. 36.A town has 1900 people. Its population grows by 25%. How many people live there now?
  37. 37.The price of a school bag changes from ₹1500 to ₹1350. By what percent did it come down?
  38. 38.A water tank holds 2640 litres. 50% of the water is used. How many litres are left?
  39. 39.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  40. 40.The price of a bicycle is ₹1760. It goes up by 15%. What is the new price (in ₹)?

Answer key

  1. 105
  2. 5
  3. 40
  4. 25
  5. 3726
  6. 33.5
  7. 3655
  8. 110
  9. 10
  10. 30
  11. 272
  12. 15
  13. 20
  14. 40
  15. 50
  16. 20
  17. 3266
  18. 2142
  19. 5
  20. 15
  21. 10.5
  22. 1656
  23. 37
  24. 5018
  25. 2506
  26. 2392
  27. 14
  28. 56
  29. 64
  30. 342
  31. 5
  32. 15.5
  33. 2730
  34. 5106
  35. 4242
  36. 2375
  37. 10
  38. 1320
  39. 57.5
  40. 2024

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