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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 452 · 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 3860 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹2440. It goes up by 50%. What is the new price (in ₹)?
  3. 3.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  4. 4.The price of a school bag changes from ₹600 to ₹300. By what percent did it come down?
  5. 5.A water tank holds 460 litres. 25% of the water is used. How many litres are left?
  6. 6.A water tank holds 3720 litres. 15% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹980 to ₹735. By what percent did it come down?
  8. 8.A water tank holds 2300 litres. 10% of the water is used. How many litres are left?
  9. 9.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹2620 to ₹2227. By what percent did it come down?
  11. 11.A water tank holds 3620 litres. 25% of the water is used. How many litres are left?
  12. 12.A water tank holds 2580 litres. 20% of the water is used. How many litres are left?
  13. 13.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  14. 14.The price of a bicycle is ₹3220. It goes up by 50%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹3100 to ₹4650. By what percent did it go up?
  16. 16.A water tank holds 1840 litres. 50% of the water is used. How many litres are left?
  17. 17.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  18. 18.A water tank holds 900 litres. 15% of the water is used. How many litres are left?
  19. 19.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  20. 20.A town has 2200 people. Its population grows by 50%. How many people live there now?
  21. 21.The price of a school bag changes from ₹1200 to ₹720. By what percent did it come down?
  22. 22.A water tank holds 2520 litres. 20% of the water is used. How many litres are left?
  23. 23.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  24. 24.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  25. 25.The price of a bicycle is ₹2140. It goes up by 10%. What is the new price (in ₹)?
  26. 26.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  27. 27.A shop sells 820 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  28. 28.The price of a bicycle is ₹2160. It goes up by 5%. What is the new price (in ₹)?
  29. 29.A water tank holds 4160 litres. 15% of the water is used. How many litres are left?
  30. 30.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹4440 to ₹6660. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹560 to ₹700. By what percent did it go up?
  33. 33.A town has 600 people. Its population grows by 15%. How many people live there now?
  34. 34.A water tank holds 2640 litres. 40% of the water is used. How many litres are left?
  35. 35.A town has 2020 people. Its population grows by 10%. How many people live there now?
  36. 36.A water tank holds 1080 litres. 40% of the water is used. How many litres are left?
  37. 37.A town has 4820 people. Its population grows by 30%. How many people live there now?
  38. 38.The price of a school bag changes from ₹3900 to ₹5850. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹1400 to ₹1330. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹820 to ₹738. By what percent did it come down?

Answer key

  1. 3667
  2. 3660
  3. 47
  4. 50
  5. 345
  6. 3162
  7. 25
  8. 2070
  9. 58
  10. 15
  11. 2715
  12. 2064
  13. 40.5
  14. 4830
  15. 50
  16. 920
  17. 19
  18. 765
  19. 43
  20. 3300
  21. 40
  22. 2016
  23. 14.5
  24. 27.5
  25. 2354
  26. 56
  27. 1066
  28. 2268
  29. 3536
  30. 56.25
  31. 50
  32. 25
  33. 690
  34. 1584
  35. 2222
  36. 648
  37. 6266
  38. 50
  39. 5
  40. 10

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