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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 500 · 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 680 litres. 15% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹2520. It goes up by 10%. What is the new price (in ₹)?
  3. 3.The price of a school bag changes from ₹540 to ₹513. By what percent did it come down?
  4. 4.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  5. 5.The price of a school bag changes from ₹1620 to ₹972. By what percent did it come down?
  6. 6.A shop sells 1940 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  7. 7.A town has 420 people. Its population grows by 50%. How many people live there now?
  8. 8.The price of a school bag changes from ₹3000 to ₹3150. By what percent did it go up?
  9. 9.The price of a bicycle is ₹4420. It goes up by 50%. What is the new price (in ₹)?
  10. 10.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  11. 11.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  12. 12.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  13. 13.The price of a bicycle is ₹3500. It goes up by 40%. What is the new price (in ₹)?
  14. 14.The price of a bicycle is ₹5000. It goes up by 15%. What is the new price (in ₹)?
  15. 15.The price of a bicycle is ₹860. It goes up by 30%. What is the new price (in ₹)?
  16. 16.A shop sells 4240 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  17. 17.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  18. 18.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  19. 19.A shop sells 80 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  20. 20.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 340 litres. 15% of the water is used. How many litres are left?
  22. 22.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  23. 23.The price of a bicycle is ₹2780. It goes up by 40%. What is the new price (in ₹)?
  24. 24.A water tank holds 3080 litres. 50% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹600 to ₹660. By what percent did it go up?
  26. 26.A water tank holds 3900 litres. 5% of the water is used. How many litres are left?
  27. 27.A water tank holds 1440 litres. 20% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹2220. It goes up by 30%. What is the new price (in ₹)?
  29. 29.A town has 1020 people. Its population grows by 40%. How many people live there now?
  30. 30.A water tank holds 3760 litres. 5% of the water is used. How many litres are left?
  31. 31.A shop sells 4320 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  32. 32.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  34. 34.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  35. 35.The price of a school bag changes from ₹460 to ₹690. By what percent did it go up?
  36. 36.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  37. 37.The price of a school bag changes from ₹1740 to ₹1218. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹3180 to ₹3021. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹1440 to ₹864. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹1260 to ₹945. By what percent did it come down?

Answer key

  1. 578
  2. 2772
  3. 5
  4. 40
  5. 40
  6. 2037
  7. 630
  8. 5
  9. 6630
  10. 26
  11. 38
  12. 32
  13. 4900
  14. 5750
  15. 1118
  16. 6360
  17. 27.5
  18. 19
  19. 112
  20. 36.5
  21. 289
  22. 19
  23. 3892
  24. 1540
  25. 10
  26. 3705
  27. 1152
  28. 2886
  29. 1428
  30. 3572
  31. 5616
  32. 43
  33. 32
  34. 46
  35. 50
  36. 65
  37. 30
  38. 5
  39. 40
  40. 25

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