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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 952 · 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 comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  2. 2.A water tank holds 1000 litres. 25% of the water is used. How many litres are left?
  3. 3.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  4. 4.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹4960 to ₹6200. By what percent did it go up?
  6. 6.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹620 to ₹744. By what percent did it go up?
  8. 8.A town has 3940 people. Its population grows by 50%. How many people live there now?
  9. 9.The price of a school bag changes from ₹2460 to ₹2583. By what percent did it go up?
  10. 10.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  11. 11.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  12. 12.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹4420 to ₹3094. By what percent did it come down?
  14. 14.A town has 4320 people. Its population grows by 10%. How many people live there now?
  15. 15.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹1060 to ₹901. By what percent did it come down?
  17. 17.A town has 3900 people. Its population grows by 50%. How many people live there now?
  18. 18.A water tank holds 4240 litres. 40% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹820 to ₹984. By what percent did it go up?
  20. 20.A town has 4200 people. Its population grows by 20%. How many people live there now?
  21. 21.A water tank holds 4180 litres. 20% of the water is used. How many litres are left?
  22. 22.A town has 2720 people. Its population grows by 50%. How many people live there now?
  23. 23.A water tank holds 4980 litres. 25% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹1420 to ₹1349. By what percent did it come down?
  25. 25.The price of a school bag changes from ₹4760 to ₹4522. By what percent did it come down?
  26. 26.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  27. 27.A water tank holds 1240 litres. 30% of the water is used. How many litres are left?
  28. 28.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  29. 29.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  30. 30.The price of a bicycle is ₹3900. It goes up by 25%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹1800 to ₹900. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹3040 to ₹2128. By what percent did it come down?
  33. 33.A water tank holds 4280 litres. 25% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹3300. It goes up by 30%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹4980 to ₹5229. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹1940 to ₹1746. By what percent did it come down?
  37. 37.A water tank holds 4880 litres. 15% of the water is used. How many litres are left?
  38. 38.A town has 160 people. Its population grows by 15%. How many people live there now?
  39. 39.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹3320 to ₹2822. By what percent did it come down?

Answer key

  1. 55
  2. 750
  3. 65
  4. 43
  5. 25
  6. 43.75
  7. 20
  8. 5910
  9. 5
  10. 55
  11. 10.5
  12. 82
  13. 30
  14. 4752
  15. 31.25
  16. 15
  17. 5850
  18. 2544
  19. 20
  20. 5040
  21. 3344
  22. 4080
  23. 3735
  24. 5
  25. 5
  26. 80
  27. 868
  28. 57.5
  29. 38
  30. 4875
  31. 50
  32. 30
  33. 3210
  34. 4290
  35. 5
  36. 10
  37. 4148
  38. 184
  39. 18.75
  40. 15

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