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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 507 · 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 4940 people. Its population grows by 5%. How many people live there now?
  2. 2.A water tank holds 2440 litres. 15% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹1000 to ₹1300. By what percent did it go up?
  4. 4.The price of a bicycle is ₹540. It goes up by 40%. What is the new price (in ₹)?
  5. 5.The price of a bicycle is ₹1040. It goes up by 5%. What is the new price (in ₹)?
  6. 6.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  7. 7.A town has 4200 people. Its population grows by 5%. How many people live there now?
  8. 8.A shop sells 2480 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹580 to ₹812. By what percent did it go up?
  10. 10.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  11. 11.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  12. 12.A water tank holds 2220 litres. 50% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹300. It goes up by 5%. What is the new price (in ₹)?
  14. 14.A shop sells 360 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  15. 15.A water tank holds 3820 litres. 10% of the water is used. How many litres are left?
  16. 16.A water tank holds 4020 litres. 10% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹3380 to ₹3718. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹800 to ₹1120. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹1440 to ₹1728. By what percent did it go up?
  20. 20.The price of a bicycle is ₹1160. It goes up by 10%. What is the new price (in ₹)?
  21. 21.A town has 940 people. Its population grows by 5%. How many people live there now?
  22. 22.The price of a school bag changes from ₹260 to ₹156. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹1960 to ₹2352. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹2580 to ₹3612. By what percent did it go up?
  25. 25.A water tank holds 1280 litres. 30% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹1320 to ₹990. By what percent did it come down?
  27. 27.The price of a bicycle is ₹400. It goes up by 15%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹280 to ₹266. By what percent did it come down?
  29. 29.A water tank holds 1760 litres. 5% of the water is used. How many litres are left?
  30. 30.A water tank holds 1700 litres. 15% of the water is used. How many litres are left?
  31. 31.A water tank holds 1660 litres. 20% of the water is used. How many litres are left?
  32. 32.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  33. 33.A water tank holds 460 litres. 15% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹1300 to ₹780. By what percent did it come down?
  35. 35.The price of a bicycle is ₹4120. It goes up by 15%. What is the new price (in ₹)?
  36. 36.A water tank holds 2300 litres. 5% of the water is used. How many litres are left?
  37. 37.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  38. 38.The price of a bicycle is ₹660. It goes up by 30%. What is the new price (in ₹)?
  39. 39.A town has 3880 people. Its population grows by 10%. How many people live there now?
  40. 40.A water tank holds 300 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 5187
  2. 2074
  3. 30
  4. 756
  5. 1092
  6. 37.5
  7. 4410
  8. 3100
  9. 40
  10. 43.75
  11. 15.5
  12. 1110
  13. 315
  14. 504
  15. 3438
  16. 3618
  17. 10
  18. 40
  19. 20
  20. 1276
  21. 987
  22. 40
  23. 20
  24. 40
  25. 896
  26. 25
  27. 460
  28. 5
  29. 1672
  30. 1445
  31. 1328
  32. 52.5
  33. 391
  34. 40
  35. 4738
  36. 2185
  37. 32
  38. 858
  39. 4268
  40. 285

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