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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 492 · 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 town has 4320 people. Its population grows by 40%. How many people live there now?
  2. 2.A water tank holds 4260 litres. 30% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹800 to ₹1120. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹300 to ₹255. By what percent did it come down?
  5. 5.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  6. 6.A town has 1340 people. Its population grows by 25%. How many people live there now?
  7. 7.A shop sells 4960 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  8. 8.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  9. 9.A town has 940 people. Its population grows by 40%. How many people live there now?
  10. 10.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  11. 11.A town has 820 people. Its population grows by 30%. How many people live there now?
  12. 12.The price of a school bag changes from ₹3540 to ₹2478. By what percent did it come down?
  13. 13.The price of a school bag changes from ₹2040 to ₹1224. By what percent did it come down?
  14. 14.A water tank holds 1020 litres. 40% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹4940 to ₹4446. By what percent did it come down?
  16. 16.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹4400. It goes up by 40%. What is the new price (in ₹)?
  18. 18.A water tank holds 1200 litres. 40% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹2320 to ₹2900. By what percent did it go up?
  20. 20.A water tank holds 1420 litres. 25% of the water is used. How many litres are left?
  21. 21.A water tank holds 2080 litres. 10% of the water is used. How many litres are left?
  22. 22.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  23. 23.The price of a bicycle is ₹740. It goes up by 25%. What is the new price (in ₹)?
  24. 24.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  25. 25.A town has 4620 people. Its population grows by 5%. How many people live there now?
  26. 26.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  27. 27.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  28. 28.A shop sells 1980 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  29. 29.A water tank holds 3820 litres. 40% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹3700 to ₹3145. By what percent did it come down?
  31. 31.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.The price of a bicycle is ₹2680. It goes up by 10%. What is the new price (in ₹)?
  33. 33.The price of a bicycle is ₹2100. It goes up by 15%. What is the new price (in ₹)?
  34. 34.The price of a school bag changes from ₹2060 to ₹3090. By what percent did it go up?
  35. 35.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  36. 36.The price of a school bag changes from ₹840 to ₹882. By what percent did it go up?
  37. 37.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  38. 38.The price of a bicycle is ₹3500. It goes up by 40%. What is the new price (in ₹)?
  39. 39.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  40. 40.A town has 4200 people. Its population grows by 15%. How many people live there now?

Answer key

  1. 6048
  2. 2982
  3. 40
  4. 15
  5. 4
  6. 1675
  7. 5952
  8. 55
  9. 1316
  10. 40.5
  11. 1066
  12. 30
  13. 40
  14. 612
  15. 10
  16. 57.5
  17. 6160
  18. 720
  19. 25
  20. 1065
  21. 1872
  22. 87.5
  23. 925
  24. 72.5
  25. 4851
  26. 26.5
  27. 26.5
  28. 2376
  29. 2292
  30. 15
  31. 52.5
  32. 2948
  33. 2415
  34. 50
  35. 60
  36. 5
  37. 65
  38. 4900
  39. 52.5
  40. 4830

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