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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 666 · 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.The price of a bicycle is ₹2760. It goes up by 20%. What is the new price (in ₹)?
  2. 2.The price of a bicycle is ₹2280. It goes up by 10%. What is the new price (in ₹)?
  3. 3.The price of a bicycle is ₹2880. It goes up by 30%. What is the new price (in ₹)?
  4. 4.A town has 340 people. Its population grows by 50%. How many people live there now?
  5. 5.A town has 3740 people. Its population grows by 25%. How many people live there now?
  6. 6.The price of a school bag changes from ₹3600 to ₹3780. By what percent did it go up?
  7. 7.A shop sells 3340 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.A town has 4740 people. Its population grows by 50%. How many people live there now?
  9. 9.A shop sells 4460 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  10. 10.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹700 to ₹770. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹2620 to ₹3013. By what percent did it go up?
  13. 13.A water tank holds 3340 litres. 5% of the water is used. How many litres are left?
  14. 14.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  15. 15.The price of a school bag changes from ₹100 to ₹140. By what percent did it go up?
  16. 16.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  17. 17.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹3640 to ₹3458. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹1060 to ₹1166. By what percent did it go up?
  20. 20.A town has 960 people. Its population grows by 20%. How many people live there now?
  21. 21.The price of a school bag changes from ₹1100 to ₹1155. By what percent did it go up?
  22. 22.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  23. 23.A water tank holds 60 litres. 50% of the water is used. How many litres are left?
  24. 24.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹380 to ₹361. By what percent did it come down?
  26. 26.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  27. 27.A town has 2940 people. Its population grows by 5%. How many people live there now?
  28. 28.The price of a school bag changes from ₹1060 to ₹1590. By what percent did it go up?
  29. 29.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  30. 30.A water tank holds 1540 litres. 15% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹480 to ₹720. By what percent did it go up?
  32. 32.The price of a bicycle is ₹3620. It goes up by 10%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹2160 to ₹2052. By what percent did it come down?
  34. 34.A town has 620 people. Its population grows by 20%. How many people live there now?
  35. 35.The price of a bicycle is ₹660. It goes up by 25%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹3420 to ₹4104. By what percent did it go up?
  37. 37.The price of a bicycle is ₹1300. It goes up by 20%. What is the new price (in ₹)?
  38. 38.A water tank holds 4440 litres. 15% of the water is used. How many litres are left?
  39. 39.A water tank holds 2280 litres. 30% of the water is used. How many litres are left?
  40. 40.A water tank holds 1220 litres. 40% of the water is used. How many litres are left?

Answer key

  1. 3312
  2. 2508
  3. 3744
  4. 510
  5. 4675
  6. 5
  7. 3507
  8. 7110
  9. 6690
  10. 26
  11. 10
  12. 15
  13. 3173
  14. 40
  15. 40
  16. 87.5
  17. 38
  18. 5
  19. 10
  20. 1152
  21. 5
  22. 60
  23. 30
  24. 47.5
  25. 5
  26. 37.5
  27. 3087
  28. 50
  29. 37
  30. 1309
  31. 50
  32. 3982
  33. 5
  34. 744
  35. 825
  36. 20
  37. 1560
  38. 3774
  39. 1596
  40. 732

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