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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 235 · 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 10% and then comes down by 30% more. By what percent has it come down in all? =
  2. 2.A water tank holds 1380 litres. 30% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹4440 to ₹3774. By what percent did it come down?
  4. 4.A water tank holds 4620 litres. 5% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹80. It goes up by 10%. What is the new price (in ₹)?
  6. 6.A shop sells 4060 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  7. 7.A shop sells 2340 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  8. 8.A shop sells 1020 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹3480 to ₹4350. By what percent did it go up?
  10. 10.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  11. 11.A shop sells 2020 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  12. 12.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  13. 13.A water tank holds 1800 litres. 30% of the water is used. How many litres are left?
  14. 14.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  15. 15.A water tank holds 4120 litres. 25% of the water is used. How many litres are left?
  16. 16.A town has 4180 people. Its population grows by 5%. How many people live there now?
  17. 17.A town has 2460 people. Its population grows by 20%. How many people live there now?
  18. 18.The price of a school bag changes from ₹4060 to ₹3248. By what percent did it come down?
  19. 19.A water tank holds 720 litres. 40% of the water is used. How many litres are left?
  20. 20.A water tank holds 2380 litres. 15% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹3220 to ₹1932. By what percent did it come down?
  22. 22.The price of a bicycle is ₹3780. It goes up by 30%. What is the new price (in ₹)?
  23. 23.The price of a school bag changes from ₹600 to ₹840. By what percent did it go up?
  24. 24.A shop sells 480 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  25. 25.The price of a school bag changes from ₹300 to ₹255. By what percent did it come down?
  26. 26.A water tank holds 4440 litres. 30% of the water is used. How many litres are left?
  27. 27.A water tank holds 1760 litres. 25% of the water is used. How many litres are left?
  28. 28.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  29. 29.A shop sells 1880 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  30. 30.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  31. 31.A water tank holds 820 litres. 10% of the water is used. How many litres are left?
  32. 32.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  33. 33.The price of a bicycle is ₹2260. It goes up by 25%. What is the new price (in ₹)?
  34. 34.The price of a school bag changes from ₹1160 to ₹1044. By what percent did it come down?
  35. 35.A water tank holds 4020 litres. 5% of the water is used. How many litres are left?
  36. 36.A water tank holds 2900 litres. 30% of the water is used. How many litres are left?
  37. 37.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.The price of a bicycle is ₹260. It goes up by 10%. What is the new price (in ₹)?
  39. 39.The price of a school bag changes from ₹360 to ₹252. By what percent did it come down?
  40. 40.A water tank holds 2540 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 37
  2. 966
  3. 15
  4. 4389
  5. 88
  6. 5684
  7. 2808
  8. 1173
  9. 25
  10. 43
  11. 2525
  12. 9.25
  13. 1260
  14. 19
  15. 3090
  16. 4389
  17. 2952
  18. 20
  19. 432
  20. 2023
  21. 40
  22. 4914
  23. 40
  24. 720
  25. 15
  26. 3108
  27. 1320
  28. 58
  29. 2256
  30. 43
  31. 738
  32. 32
  33. 2825
  34. 10
  35. 3819
  36. 2030
  37. 31.25
  38. 286
  39. 30
  40. 1905

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