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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 439 · 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 1320 litres. 15% of the water is used. How many litres are left?
  2. 2.A shop sells 4800 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  3. 3.A water tank holds 620 litres. 30% of the water is used. How many litres are left?
  4. 4.A water tank holds 4200 litres. 30% of the water is used. How many litres are left?
  5. 5.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹4400 to ₹6160. By what percent did it go up?
  7. 7.A water tank holds 4680 litres. 30% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹4740 to ₹6636. By what percent did it go up?
  9. 9.A town has 3540 people. Its population grows by 50%. How many people live there now?
  10. 10.A water tank holds 2900 litres. 5% of the water is used. How many litres are left?
  11. 11.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  12. 12.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  13. 13.A shop sells 1080 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  14. 14.The price of a school bag changes from ₹1700 to ₹2210. By what percent did it go up?
  15. 15.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  16. 16.The price of a school bag changes from ₹1400 to ₹1260. By what percent did it come down?
  17. 17.The price of a school bag changes from ₹2220 to ₹2331. By what percent did it go up?
  18. 18.The price of a bicycle is ₹4500. It goes up by 25%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹1120 to ₹1232. By what percent did it go up?
  20. 20.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 3500 litres. 50% of the water is used. How many litres are left?
  22. 22.A town has 1740 people. Its population grows by 40%. How many people live there now?
  23. 23.The price of a bicycle is ₹4080. It goes up by 50%. What is the new price (in ₹)?
  24. 24.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹4140 to ₹5175. By what percent did it go up?
  26. 26.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  27. 27.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  28. 28.The price of a bicycle is ₹2020. It goes up by 20%. What is the new price (in ₹)?
  29. 29.A water tank holds 300 litres. 15% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹1260 to ₹1638. By what percent did it go up?
  31. 31.A water tank holds 1720 litres. 15% of the water is used. How many litres are left?
  32. 32.A town has 2740 people. Its population grows by 25%. How many people live there now?
  33. 33.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  34. 34.The price of a school bag changes from ₹60 to ₹54. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹2120 to ₹2014. By what percent did it come down?
  36. 36.A shop sells 1300 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  37. 37.The price of a bicycle is ₹680. It goes up by 50%. What is the new price (in ₹)?
  38. 38.The price of a school bag changes from ₹500 to ₹425. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹980 to ₹833. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹2160 to ₹2052. By what percent did it come down?

Answer key

  1. 1122
  2. 5040
  3. 434
  4. 2940
  5. 68
  6. 40
  7. 3276
  8. 40
  9. 5310
  10. 2755
  11. 15.5
  12. 28.75
  13. 1188
  14. 30
  15. 28
  16. 10
  17. 5
  18. 5625
  19. 10
  20. 37.5
  21. 1750
  22. 2436
  23. 6120
  24. 62.5
  25. 25
  26. 15.5
  27. 95
  28. 2424
  29. 255
  30. 30
  31. 1462
  32. 3425
  33. 58
  34. 10
  35. 5
  36. 1560
  37. 1020
  38. 15
  39. 15
  40. 5

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