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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 682 · 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 town has 2940 people. Its population grows by 15%. How many people live there now?
  2. 2.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  3. 3.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  4. 4.The price of a school bag changes from ₹2840 to ₹3266. By what percent did it go up?
  5. 5.A water tank holds 4740 litres. 5% of the water is used. How many litres are left?
  6. 6.The price of a bicycle is ₹2340. It goes up by 30%. What is the new price (in ₹)?
  7. 7.The price of a school bag changes from ₹4800 to ₹6000. By what percent did it go up?
  8. 8.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹1380 to ₹1725. By what percent did it go up?
  10. 10.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹940 to ₹470. By what percent did it come down?
  12. 12.A water tank holds 1460 litres. 25% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹1400. It goes up by 30%. What is the new price (in ₹)?
  14. 14.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  15. 15.A town has 1900 people. Its population grows by 5%. How many people live there now?
  16. 16.A shop sells 4000 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  17. 17.A shop sells 1720 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  18. 18.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  19. 19.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  20. 20.The price of a school bag changes from ₹4100 to ₹2460. By what percent did it come down?
  21. 21.A water tank holds 2260 litres. 10% of the water is used. How many litres are left?
  22. 22.A shop sells 3380 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  23. 23.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  24. 24.The price of a bicycle is ₹4380. It goes up by 5%. What is the new price (in ₹)?
  25. 25.A water tank holds 2100 litres. 30% of the water is used. How many litres are left?
  26. 26.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  27. 27.The price of a bicycle is ₹2560. It goes up by 25%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹220 to ₹209. By what percent did it come down?
  29. 29.A shop sells 4040 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹2060 to ₹2884. By what percent did it go up?
  31. 31.The price of a school bag changes from ₹680 to ₹544. By what percent did it come down?
  32. 32.A shop sells 3300 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  33. 33.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  34. 34.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  35. 35.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  36. 36.A water tank holds 3340 litres. 5% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹80 to ₹120. By what percent did it go up?
  38. 38.The price of a school bag changes from ₹4780 to ₹4302. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹240 to ₹312. By what percent did it go up?
  40. 40.A shop sells 3520 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?

Answer key

  1. 3381
  2. 24
  3. 87.5
  4. 15
  5. 4503
  6. 3042
  7. 25
  8. 15.5
  9. 25
  10. 57.5
  11. 50
  12. 1095
  13. 1820
  14. 32.5
  15. 1995
  16. 4200
  17. 2064
  18. 26
  19. 19.25
  20. 40
  21. 2034
  22. 4225
  23. 14.5
  24. 4599
  25. 1470
  26. 43
  27. 3200
  28. 5
  29. 4848
  30. 40
  31. 20
  32. 3960
  33. 17
  34. 56
  35. 65
  36. 3173
  37. 50
  38. 10
  39. 30
  40. 4576

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