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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 245 · 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 2600 litres. 20% of the water is used. How many litres are left?
  2. 2.A town has 2960 people. Its population grows by 50%. How many people live there now?
  3. 3.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  4. 4.The price of a bicycle is ₹2760. It goes up by 15%. What is the new price (in ₹)?
  5. 5.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  6. 6.A water tank holds 300 litres. 20% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹2220 to ₹2664. By what percent did it go up?
  8. 8.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  9. 9.A water tank holds 400 litres. 15% of the water is used. How many litres are left?
  10. 10.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹1760 to ₹1496. By what percent did it come down?
  12. 12.The price of a bicycle is ₹2800. It goes up by 5%. What is the new price (in ₹)?
  13. 13.A water tank holds 480 litres. 5% of the water is used. How many litres are left?
  14. 14.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹2460. It goes up by 30%. What is the new price (in ₹)?
  16. 16.The price of a school bag changes from ₹1660 to ₹1411. By what percent did it come down?
  17. 17.The price of a school bag changes from ₹3040 to ₹2888. By what percent did it come down?
  18. 18.A water tank holds 1020 litres. 20% of the water is used. How many litres are left?
  19. 19.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  20. 20.A town has 740 people. Its population grows by 5%. How many people live there now?
  21. 21.The price of a school bag changes from ₹4300 to ₹4945. By what percent did it go up?
  22. 22.A water tank holds 2240 litres. 50% of the water is used. How many litres are left?
  23. 23.A water tank holds 1960 litres. 10% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹880 to ₹528. By what percent did it come down?
  25. 25.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹2100 to ₹1995. By what percent did it come down?
  27. 27.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹2540 to ₹2794. By what percent did it go up?
  29. 29.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  30. 30.The price of a school bag changes from ₹3160 to ₹2370. By what percent did it come down?
  31. 31.The price of a bicycle is ₹4840. It goes up by 30%. What is the new price (in ₹)?
  32. 32.The price of a bicycle is ₹2140. It goes up by 30%. What is the new price (in ₹)?
  33. 33.A town has 4520 people. Its population grows by 10%. How many people live there now?
  34. 34.A water tank holds 1380 litres. 10% of the water is used. How many litres are left?
  35. 35.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  36. 36.A town has 4820 people. Its population grows by 10%. How many people live there now?
  37. 37.A water tank holds 3180 litres. 10% of the water is used. How many litres are left?
  38. 38.A water tank holds 1980 litres. 10% of the water is used. How many litres are left?
  39. 39.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 1600 litres. 40% of the water is used. How many litres are left?

Answer key

  1. 2080
  2. 4440
  3. 23.5
  4. 3174
  5. 110
  6. 240
  7. 20
  8. 68
  9. 340
  10. 38
  11. 15
  12. 2940
  13. 456
  14. 18.75
  15. 3198
  16. 15
  17. 5
  18. 816
  19. 56.25
  20. 777
  21. 15
  22. 1120
  23. 1764
  24. 40
  25. 12
  26. 5
  27. 82
  28. 10
  29. 28.75
  30. 25
  31. 6292
  32. 2782
  33. 4972
  34. 1242
  35. 43
  36. 5302
  37. 2862
  38. 1782
  39. 65
  40. 960

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