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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 415 · 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 water tank holds 480 litres. 40% of the water is used. How many litres are left?
  2. 2.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  3. 3.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  4. 4.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  5. 5.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹1940 to ₹1164. By what percent did it come down?
  7. 7.The price of a bicycle is ₹4000. It goes up by 30%. What is the new price (in ₹)?
  8. 8.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  9. 9.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 3120 litres. 5% of the water is used. How many litres are left?
  11. 11.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  12. 12.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  13. 13.The price of a school bag changes from ₹840 to ₹882. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹4520 to ₹2712. By what percent did it come down?
  15. 15.The price of a bicycle is ₹1840. It goes up by 10%. What is the new price (in ₹)?
  16. 16.A water tank holds 1600 litres. 20% of the water is used. How many litres are left?
  17. 17.A town has 1580 people. Its population grows by 20%. How many people live there now?
  18. 18.The price of a school bag changes from ₹3400 to ₹2380. By what percent did it come down?
  19. 19.The price of a bicycle is ₹4500. It goes up by 25%. What is the new price (in ₹)?
  20. 20.The price of a bicycle is ₹700. It goes up by 10%. What is the new price (in ₹)?
  21. 21.A shop sells 4980 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  22. 22.A water tank holds 1300 litres. 25% of the water is used. How many litres are left?
  23. 23.A water tank holds 700 litres. 30% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹2840. It goes up by 5%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹1120 to ₹1008. By what percent did it come down?
  26. 26.A water tank holds 200 litres. 30% of the water is used. How many litres are left?
  27. 27.The price of a bicycle is ₹2100. It goes up by 15%. What is the new price (in ₹)?
  28. 28.A water tank holds 2140 litres. 25% of the water is used. How many litres are left?
  29. 29.A town has 3600 people. Its population grows by 5%. How many people live there now?
  30. 30.The price of a bicycle is ₹4020. It goes up by 5%. What is the new price (in ₹)?
  31. 31.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹260 to ₹325. By what percent did it go up?
  33. 33.A water tank holds 4720 litres. 10% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹4060. It goes up by 50%. What is the new price (in ₹)?
  35. 35.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  36. 36.The price of a school bag changes from ₹3340 to ₹3006. By what percent did it come down?
  37. 37.A water tank holds 1340 litres. 15% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹160 to ₹96. By what percent did it come down?
  39. 39.A water tank holds 3800 litres. 15% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹2020 to ₹3030. By what percent did it go up?

Answer key

  1. 288
  2. 87.5
  3. 36
  4. 28.75
  5. 70
  6. 40
  7. 5200
  8. 35
  9. 56
  10. 2964
  11. 31.25
  12. 64
  13. 5
  14. 40
  15. 2024
  16. 1280
  17. 1896
  18. 30
  19. 5625
  20. 770
  21. 5478
  22. 975
  23. 490
  24. 2982
  25. 10
  26. 140
  27. 2415
  28. 1605
  29. 3780
  30. 4221
  31. 36.5
  32. 25
  33. 4248
  34. 6090
  35. 58
  36. 10
  37. 1139
  38. 40
  39. 3230
  40. 50

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