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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 9 · 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 10% and then comes down by 50% more. By what percent has it come down in all? =
  2. 2.The price of a school bag changes from ₹2320 to ₹3480. By what percent did it go up?
  3. 3.A water tank holds 100 litres. 50% of the water is used. How many litres are left?
  4. 4.The price of a bicycle is ₹4680. It goes up by 15%. What is the new price (in ₹)?
  5. 5.The price of a bicycle is ₹3720. It goes up by 10%. What is the new price (in ₹)?
  6. 6.A town has 480 people. Its population grows by 25%. How many people live there now?
  7. 7.The price of a school bag changes from ₹4940 to ₹2964. By what percent did it come down?
  8. 8.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  9. 9.A town has 4860 people. Its population grows by 50%. How many people live there now?
  10. 10.A water tank holds 3280 litres. 50% of the water is used. How many litres are left?
  11. 11.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  12. 12.A water tank holds 200 litres. 40% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹140. It goes up by 25%. What is the new price (in ₹)?
  14. 14.The price of a school bag changes from ₹4320 to ₹3024. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹3680 to ₹4784. By what percent did it go up?
  16. 16.A water tank holds 1640 litres. 30% of the water is used. How many litres are left?
  17. 17.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  18. 18.A water tank holds 3920 litres. 5% of the water is used. How many litres are left?
  19. 19.A water tank holds 4080 litres. 20% of the water is used. How many litres are left?
  20. 20.A water tank holds 2180 litres. 30% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹2660 to ₹3724. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹1860 to ₹1674. By what percent did it come down?
  23. 23.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.A town has 3440 people. Its population grows by 25%. How many people live there now?
  25. 25.The price of a school bag changes from ₹3560 to ₹4094. By what percent did it go up?
  26. 26.A shop sells 1260 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  27. 27.The price of a school bag changes from ₹200 to ₹160. By what percent did it come down?
  28. 28.The price of a bicycle is ₹4980. It goes up by 5%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹320 to ₹336. By what percent did it go up?
  30. 30.A shop sells 2020 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  31. 31.A water tank holds 3540 litres. 40% of the water is used. How many litres are left?
  32. 32.A water tank holds 780 litres. 5% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹2660 to ₹2793. By what percent did it go up?
  34. 34.A town has 980 people. Its population grows by 40%. How many people live there now?
  35. 35.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  36. 36.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  37. 37.The price of a school bag changes from ₹420 to ₹588. By what percent did it go up?
  38. 38.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 3340 litres. 30% of the water is used. How many litres are left?
  40. 40.The price of a bicycle is ₹3400. It goes up by 30%. What is the new price (in ₹)?

Answer key

  1. 55
  2. 50
  3. 50
  4. 5382
  5. 4092
  6. 600
  7. 40
  8. 44
  9. 7290
  10. 1640
  11. 26.5
  12. 120
  13. 175
  14. 30
  15. 30
  16. 1148
  17. 24
  18. 3724
  19. 3264
  20. 1526
  21. 40
  22. 10
  23. 62.5
  24. 4300
  25. 15
  26. 1512
  27. 20
  28. 5229
  29. 5
  30. 2323
  31. 2124
  32. 741
  33. 5
  34. 1372
  35. 110
  36. 40.5
  37. 40
  38. 82
  39. 2338
  40. 4420

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