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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 501 · 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 price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  2. 2.The price of a bicycle is ₹500. It goes up by 30%. What is the new price (in ₹)?
  3. 3.The price of a school bag changes from ₹2360 to ₹2950. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹580 to ₹290. By what percent did it come down?
  5. 5.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  6. 6.The price of a bicycle is ₹4280. It goes up by 20%. What is the new price (in ₹)?
  7. 7.The price of a bicycle is ₹520. It goes up by 20%. What is the new price (in ₹)?
  8. 8.A water tank holds 2400 litres. 10% of the water is used. How many litres are left?
  9. 9.A water tank holds 4420 litres. 30% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹2720 to ₹2312. By what percent did it come down?
  11. 11.A town has 1060 people. Its population grows by 25%. How many people live there now?
  12. 12.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  13. 13.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  14. 14.The price of a bicycle is ₹4120. It goes up by 10%. What is the new price (in ₹)?
  15. 15.A water tank holds 2320 litres. 15% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹3840. It goes up by 10%. What is the new price (in ₹)?
  17. 17.A town has 4180 people. Its population grows by 40%. How many people live there now?
  18. 18.The price of a school bag changes from ₹460 to ₹690. By what percent did it go up?
  19. 19.A town has 2100 people. Its population grows by 10%. How many people live there now?
  20. 20.A shop sells 960 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  21. 21.A town has 440 people. Its population grows by 5%. How many people live there now?
  22. 22.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  23. 23.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  25. 25.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  26. 26.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  27. 27.A water tank holds 1180 litres. 25% of the water is used. How many litres are left?
  28. 28.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  29. 29.A shop sells 1220 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹3900 to ₹4680. By what percent did it go up?
  31. 31.A town has 2300 people. Its population grows by 40%. How many people live there now?
  32. 32.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  33. 33.A water tank holds 1760 litres. 15% of the water is used. How many litres are left?
  34. 34.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  35. 35.A water tank holds 180 litres. 25% of the water is used. How many litres are left?
  36. 36.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  37. 37.A water tank holds 2940 litres. 10% of the water is used. How many litres are left?
  38. 38.A water tank holds 3120 litres. 10% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹2300 to ₹2070. By what percent did it come down?
  40. 40.A town has 620 people. Its population grows by 25%. How many people live there now?

Answer key

  1. 5
  2. 650
  3. 25
  4. 50
  5. 28
  6. 5136
  7. 624
  8. 2160
  9. 3094
  10. 15
  11. 1325
  12. 12.5
  13. 61
  14. 4532
  15. 1972
  16. 4224
  17. 5852
  18. 50
  19. 2310
  20. 1440
  21. 462
  22. 58
  23. 44
  24. 20.75
  25. 75
  26. 27.75
  27. 885
  28. 65
  29. 1830
  30. 20
  31. 3220
  32. 8
  33. 1496
  34. 50
  35. 135
  36. 46
  37. 2646
  38. 2808
  39. 10
  40. 775

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