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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 921 · 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.The price of a school bag changes from ₹4840 to ₹4114. By what percent did it come down?
  2. 2.The price of a school bag changes from ₹3560 to ₹4984. By what percent did it go up?
  3. 3.A town has 920 people. Its population grows by 15%. How many people live there now?
  4. 4.The price of a school bag changes from ₹1240 to ₹1860. By what percent did it go up?
  5. 5.The price of a bicycle is ₹500. It goes up by 50%. What is the new price (in ₹)?
  6. 6.The price of a bicycle is ₹2660. It goes up by 50%. What is the new price (in ₹)?
  7. 7.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  8. 8.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  9. 9.A water tank holds 960 litres. 25% of the water is used. How many litres are left?
  10. 10.A water tank holds 4060 litres. 50% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹3120 to ₹3276. By what percent did it go up?
  12. 12.A town has 960 people. Its population grows by 20%. How many people live there now?
  13. 13.The price of a school bag changes from ₹480 to ₹408. By what percent did it come down?
  14. 14.A shop sells 640 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹3200 to ₹3520. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹680 to ₹782. By what percent did it go up?
  17. 17.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  18. 18.A water tank holds 2160 litres. 10% of the water is used. How many litres are left?
  19. 19.The price of a bicycle is ₹460. It goes up by 20%. What is the new price (in ₹)?
  20. 20.A town has 600 people. Its population grows by 30%. How many people live there now?
  21. 21.The price of a school bag changes from ₹4380 to ₹5694. By what percent did it go up?
  22. 22.A water tank holds 320 litres. 25% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹3040 to ₹2584. By what percent did it come down?
  24. 24.A water tank holds 4000 litres. 5% of the water is used. How many litres are left?
  25. 25.A water tank holds 2260 litres. 50% of the water is used. How many litres are left?
  26. 26.A water tank holds 380 litres. 10% of the water is used. How many litres are left?
  27. 27.The price of a bicycle is ₹2340. It goes up by 20%. What is the new price (in ₹)?
  28. 28.A water tank holds 560 litres. 5% of the water is used. How many litres are left?
  29. 29.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  30. 30.A shop sells 620 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  31. 31.The price of a school bag changes from ₹260 to ₹286. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹3540 to ₹1770. By what percent did it come down?
  33. 33.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  34. 34.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  35. 35.The price of a bicycle is ₹1260. It goes up by 5%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹4160 to ₹3952. By what percent did it come down?
  37. 37.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  38. 38.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹900 to ₹990. By what percent did it go up?
  40. 40.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =

Answer key

  1. 15
  2. 40
  3. 1058
  4. 50
  5. 750
  6. 3990
  7. 56
  8. 33
  9. 720
  10. 2030
  11. 5
  12. 1152
  13. 15
  14. 736
  15. 10
  16. 15
  17. 82
  18. 1944
  19. 552
  20. 780
  21. 30
  22. 240
  23. 15
  24. 3800
  25. 1130
  26. 342
  27. 2808
  28. 532
  29. 55
  30. 682
  31. 10
  32. 50
  33. 10.25
  34. 40.5
  35. 1323
  36. 5
  37. 52
  38. 50
  39. 10
  40. 82

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