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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 113 · 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 ₹3380. It goes up by 40%. What is the new price (in ₹)?
  2. 2.A town has 4100 people. Its population grows by 10%. How many people live there now?
  3. 3.The price of a bicycle is ₹4580. It goes up by 5%. What is the new price (in ₹)?
  4. 4.A water tank holds 840 litres. 5% of the water is used. How many litres are left?
  5. 5.A water tank holds 780 litres. 10% of the water is used. How many litres are left?
  6. 6.The price of a bicycle is ₹4080. It goes up by 20%. What is the new price (in ₹)?
  7. 7.A water tank holds 4520 litres. 25% of the water is used. How many litres are left?
  8. 8.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  9. 9.The price of a school bag changes from ₹260 to ₹299. By what percent did it go up?
  10. 10.A town has 3020 people. Its population grows by 30%. How many people live there now?
  11. 11.The price of a school bag changes from ₹4020 to ₹3417. By what percent did it come down?
  12. 12.A water tank holds 980 litres. 20% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹4260. It goes up by 30%. What is the new price (in ₹)?
  14. 14.The price of a school bag changes from ₹100 to ₹80. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹1780 to ₹2136. By what percent did it go up?
  16. 16.A water tank holds 3320 litres. 15% of the water is used. How many litres are left?
  17. 17.A water tank holds 4580 litres. 40% of the water is used. How many litres are left?
  18. 18.A shop sells 2440 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹840 to ₹1008. By what percent did it go up?
  20. 20.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  21. 21.A shop sells 2520 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  22. 22.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  23. 23.The price of a school bag changes from ₹2300 to ₹2070. By what percent did it come down?
  24. 24.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  25. 25.A water tank holds 1740 litres. 20% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹2600 to ₹2730. By what percent did it go up?
  27. 27.A town has 2540 people. Its population grows by 15%. How many people live there now?
  28. 28.A town has 1000 people. Its population grows by 50%. How many people live there now?
  29. 29.The price of a school bag changes from ₹1120 to ₹952. By what percent did it come down?
  30. 30.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  31. 31.A water tank holds 2280 litres. 15% of the water is used. How many litres are left?
  32. 32.A shop sells 4380 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  33. 33.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  34. 34.The price of a school bag changes from ₹3620 to ₹3982. By what percent did it go up?
  35. 35.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 3540 litres. 25% of the water is used. How many litres are left?
  37. 37.A town has 3040 people. Its population grows by 20%. How many people live there now?
  38. 38.A town has 560 people. Its population grows by 40%. How many people live there now?
  39. 39.A shop sells 1700 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  40. 40.A shop sells 4460 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?

Answer key

  1. 4732
  2. 4510
  3. 4809
  4. 798
  5. 702
  6. 4896
  7. 3390
  8. 65
  9. 15
  10. 3926
  11. 15
  12. 784
  13. 5538
  14. 20
  15. 20
  16. 2822
  17. 2748
  18. 3660
  19. 20
  20. 5
  21. 2772
  22. 4
  23. 10
  24. 95
  25. 1392
  26. 5
  27. 2921
  28. 1500
  29. 15
  30. 20
  31. 1938
  32. 6132
  33. 57.5
  34. 10
  35. 65
  36. 2655
  37. 3648
  38. 784
  39. 2380
  40. 4683

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