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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 152 · 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 700 litres. 25% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹4540 to ₹3632. By what percent did it come down?
  3. 3.The price of a school bag changes from ₹4560 to ₹6384. By what percent did it go up?
  4. 4.A town has 4800 people. Its population grows by 15%. How many people live there now?
  5. 5.A water tank holds 2040 litres. 20% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹4180 to ₹3553. By what percent did it come down?
  7. 7.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  8. 8.The price of a school bag changes from ₹700 to ₹735. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹4440 to ₹5772. By what percent did it go up?
  10. 10.A water tank holds 5000 litres. 40% of the water is used. How many litres are left?
  11. 11.The price of a bicycle is ₹3860. It goes up by 40%. What is the new price (in ₹)?
  12. 12.A shop sells 2700 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  13. 13.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  14. 14.The price of a bicycle is ₹800. It goes up by 40%. What is the new price (in ₹)?
  15. 15.A water tank holds 2620 litres. 50% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹720 to ₹936. By what percent did it go up?
  17. 17.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  18. 18.A water tank holds 1100 litres. 10% of the water is used. How many litres are left?
  19. 19.A shop sells 220 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  20. 20.A town has 4260 people. Its population grows by 25%. How many people live there now?
  21. 21.The price of a school bag changes from ₹3380 to ₹1690. By what percent did it come down?
  22. 22.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  23. 23.A town has 500 people. Its population grows by 5%. How many people live there now?
  24. 24.A shop sells 2140 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  25. 25.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  26. 26.The price of a bicycle is ₹3780. It goes up by 50%. What is the new price (in ₹)?
  27. 27.A water tank holds 4420 litres. 30% of the water is used. How many litres are left?
  28. 28.A shop sells 2000 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹160 to ₹240. By what percent did it go up?
  30. 30.The price of a bicycle is ₹1300. It goes up by 50%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹4260 to ₹5112. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹1260 to ₹1764. By what percent did it go up?
  33. 33.The price of a bicycle is ₹1640. It goes up by 30%. What is the new price (in ₹)?
  34. 34.A town has 2600 people. Its population grows by 10%. How many people live there now?
  35. 35.A water tank holds 1800 litres. 30% of the water is used. How many litres are left?
  36. 36.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  37. 37.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  38. 38.A water tank holds 420 litres. 15% of the water is used. How many litres are left?
  39. 39.A shop sells 320 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  40. 40.The price of a bicycle is ₹3500. It goes up by 25%. What is the new price (in ₹)?

Answer key

  1. 525
  2. 20
  3. 40
  4. 5520
  5. 1632
  6. 15
  7. 32.5
  8. 5
  9. 30
  10. 3000
  11. 5404
  12. 2970
  13. 60
  14. 1120
  15. 1310
  16. 30
  17. 80
  18. 990
  19. 242
  20. 5325
  21. 50
  22. 27.75
  23. 525
  24. 2461
  25. 61
  26. 5670
  27. 3094
  28. 2800
  29. 50
  30. 1950
  31. 20
  32. 40
  33. 2132
  34. 2860
  35. 1260
  36. 21
  37. 32
  38. 357
  39. 384
  40. 4375

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