← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 899 · 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 800 litres. 25% of the water is used. How many litres are left?
  2. 2.A water tank holds 1160 litres. 20% of the water is used. How many litres are left?
  3. 3.The price of a bicycle is ₹3940. It goes up by 30%. What is the new price (in ₹)?
  4. 4.The price of a bicycle is ₹980. It goes up by 50%. What is the new price (in ₹)?
  5. 5.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  6. 6.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  7. 7.The price of a school bag changes from ₹2060 to ₹2369. By what percent did it go up?
  8. 8.The price of a school bag changes from ₹720 to ₹684. By what percent did it come down?
  9. 9.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  10. 10.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  11. 11.A water tank holds 3780 litres. 30% of the water is used. How many litres are left?
  12. 12.A water tank holds 1340 litres. 20% of the water is used. How many litres are left?
  13. 13.A water tank holds 1480 litres. 10% of the water is used. How many litres are left?
  14. 14.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  15. 15.A town has 100 people. Its population grows by 20%. How many people live there now?
  16. 16.The price of a bicycle is ₹2600. It goes up by 25%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹3920. It goes up by 15%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹4660 to ₹3728. By what percent did it come down?
  19. 19.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  20. 20.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  21. 21.The price of a bicycle is ₹3620. It goes up by 5%. What is the new price (in ₹)?
  22. 22.A water tank holds 2340 litres. 50% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹420. It goes up by 5%. What is the new price (in ₹)?
  24. 24.The price of a bicycle is ₹2700. It goes up by 10%. What is the new price (in ₹)?
  25. 25.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹1760 to ₹1936. By what percent did it go up?
  27. 27.A town has 3080 people. Its population grows by 40%. How many people live there now?
  28. 28.A water tank holds 3080 litres. 5% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹760 to ₹798. By what percent did it go up?
  30. 30.A water tank holds 4820 litres. 40% of the water is used. How many litres are left?
  31. 31.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹1040 to ₹780. By what percent did it come down?
  33. 33.The price of a bicycle is ₹820. It goes up by 10%. What is the new price (in ₹)?
  34. 34.A water tank holds 960 litres. 15% of the water is used. How many litres are left?
  35. 35.A water tank holds 2880 litres. 5% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹240 to ₹228. By what percent did it come down?
  37. 37.A water tank holds 2520 litres. 40% of the water is used. How many litres are left?
  38. 38.A water tank holds 4640 litres. 25% of the water is used. How many litres are left?
  39. 39.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 2740 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 600
  2. 928
  3. 5122
  4. 1470
  5. 56
  6. 28.75
  7. 15
  8. 5
  9. 37.5
  10. 5
  11. 2646
  12. 1072
  13. 1332
  14. 46
  15. 120
  16. 3250
  17. 4508
  18. 20
  19. 96
  20. 32
  21. 3801
  22. 1170
  23. 441
  24. 2970
  25. 32.25
  26. 10
  27. 4312
  28. 2926
  29. 5
  30. 2892
  31. 57.5
  32. 25
  33. 902
  34. 816
  35. 2736
  36. 5
  37. 1512
  38. 3480
  39. 31.25
  40. 2329

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude