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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 57 · 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.

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  1. 1.A water tank holds 1200 litres. 15% of the water is used. How many litres are left?
  2. 2.A shop sells 4800 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  3. 3.The price of a bicycle is ₹3700. It goes up by 50%. What is the new price (in ₹)?
  4. 4.A town has 220 people. Its population grows by 5%. How many people live there now?
  5. 5.A water tank holds 1460 litres. 25% of the water is used. How many litres are left?
  6. 6.A water tank holds 380 litres. 10% of the water is used. How many litres are left?
  7. 7.A shop sells 1040 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  8. 8.The price of a school bag changes from ₹4860 to ₹6804. By what percent did it go up?
  9. 9.The price of a bicycle is ₹4720. It goes up by 30%. What is the new price (in ₹)?
  10. 10.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  11. 11.The price of a bicycle is ₹1160. It goes up by 50%. What is the new price (in ₹)?
  12. 12.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  13. 13.A shop sells 3660 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  14. 14.The price of a bicycle is ₹4960. It goes up by 25%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹1760 to ₹1056. By what percent did it come down?
  16. 16.A town has 1040 people. Its population grows by 40%. How many people live there now?
  17. 17.A shop sells 1900 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  18. 18.The price of a bicycle is ₹3120. It goes up by 50%. What is the new price (in ₹)?
  19. 19.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹3820 to ₹2292. By what percent did it come down?
  21. 21.The price of a school bag changes from ₹4140 to ₹2484. By what percent did it come down?
  22. 22.A water tank holds 4440 litres. 30% of the water is used. How many litres are left?
  23. 23.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  24. 24.The price of a school bag changes from ₹160 to ₹240. By what percent did it go up?
  25. 25.A town has 3300 people. Its population grows by 25%. How many people live there now?
  26. 26.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  27. 27.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  28. 28.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹4080 to ₹4488. By what percent did it go up?
  30. 30.A town has 4160 people. Its population grows by 40%. How many people live there now?
  31. 31.The price of a school bag changes from ₹940 to ₹1034. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹3600 to ₹4320. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹3540 to ₹4071. By what percent did it go up?
  34. 34.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  35. 35.The price of a bicycle is ₹100. It goes up by 30%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹1060 to ₹530. By what percent did it come down?
  37. 37.The price of a school bag changes from ₹3700 to ₹2960. By what percent did it come down?
  38. 38.A water tank holds 3260 litres. 30% of the water is used. How many litres are left?
  39. 39.A water tank holds 580 litres. 10% of the water is used. How many litres are left?
  40. 40.A shop sells 1780 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?

Answer key

  1. 1020
  2. 5760
  3. 5550
  4. 231
  5. 1095
  6. 342
  7. 1248
  8. 40
  9. 6136
  10. 19.25
  11. 1740
  12. 3.5
  13. 3843
  14. 6200
  15. 40
  16. 1456
  17. 2470
  18. 4680
  19. 44
  20. 40
  21. 40
  22. 3108
  23. 125
  24. 50
  25. 4125
  26. 37
  27. 43
  28. 32.25
  29. 10
  30. 5824
  31. 10
  32. 20
  33. 15
  34. 36.25
  35. 130
  36. 50
  37. 20
  38. 2282
  39. 522
  40. 1958

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