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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 286 · 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 1680 litres. 15% of the water is used. How many litres are left?
  2. 2.A town has 4340 people. Its population grows by 30%. How many people live there now?
  3. 3.The price of a school bag changes from ₹2780 to ₹3058. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹2820 to ₹3243. By what percent did it go up?
  5. 5.A shop sells 4440 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  6. 6.A shop sells 4460 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  7. 7.The price of a bicycle is ₹4160. It goes up by 10%. What is the new price (in ₹)?
  8. 8.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹800 to ₹680. By what percent did it come down?
  10. 10.The price of a bicycle is ₹2380. It goes up by 5%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹2940 to ₹1470. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹4140 to ₹5796. By what percent did it go up?
  13. 13.A shop sells 3320 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  14. 14.The price of a school bag changes from ₹360 to ₹432. By what percent did it go up?
  15. 15.A shop sells 3660 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  16. 16.The price of a bicycle is ₹2620. It goes up by 15%. What is the new price (in ₹)?
  17. 17.A water tank holds 3460 litres. 25% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹1260 to ₹1134. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹4700 to ₹3995. By what percent did it come down?
  20. 20.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  21. 21.The price of a school bag changes from ₹3840 to ₹2880. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹2580 to ₹2709. By what percent did it go up?
  23. 23.A shop sells 2260 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹3940 to ₹3349. By what percent did it come down?
  25. 25.A town has 3980 people. Its population grows by 15%. How many people live there now?
  26. 26.A town has 4160 people. Its population grows by 20%. How many people live there now?
  27. 27.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  28. 28.A water tank holds 3920 litres. 20% of the water is used. How many litres are left?
  29. 29.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  30. 30.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹4840 to ₹5808. By what percent did it go up?
  32. 32.The price of a bicycle is ₹3800. It goes up by 30%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹760 to ₹684. By what percent did it come down?
  34. 34.A water tank holds 1900 litres. 20% of the water is used. How many litres are left?
  35. 35.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  36. 36.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  37. 37.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  38. 38.A water tank holds 4160 litres. 25% of the water is used. How many litres are left?
  39. 39.The price of a bicycle is ₹4760. It goes up by 5%. What is the new price (in ₹)?
  40. 40.The price of a bicycle is ₹4500. It goes up by 10%. What is the new price (in ₹)?

Answer key

  1. 1428
  2. 5642
  3. 10
  4. 15
  5. 6660
  6. 4906
  7. 4576
  8. 95
  9. 15
  10. 2499
  11. 50
  12. 40
  13. 4980
  14. 20
  15. 5490
  16. 3013
  17. 2595
  18. 10
  19. 15
  20. 14.5
  21. 25
  22. 5
  23. 2486
  24. 15
  25. 4577
  26. 4992
  27. 36.25
  28. 3136
  29. 32.5
  30. 4
  31. 20
  32. 4940
  33. 10
  34. 1520
  35. 37
  36. 95
  37. 12
  38. 3120
  39. 4998
  40. 4950

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