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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 771 · 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 price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  2. 2.A water tank holds 4840 litres. 20% of the water is used. How many litres are left?
  3. 3.A water tank holds 2360 litres. 10% of the water is used. How many litres are left?
  4. 4.A town has 3220 people. Its population grows by 5%. How many people live there now?
  5. 5.The price of a school bag changes from ₹3080 to ₹3542. By what percent did it go up?
  6. 6.A water tank holds 2220 litres. 50% of the water is used. How many litres are left?
  7. 7.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  8. 8.A town has 2540 people. Its population grows by 40%. How many people live there now?
  9. 9.The price of a school bag changes from ₹1820 to ₹2730. By what percent did it go up?
  10. 10.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  11. 11.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  12. 12.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 4720 litres. 40% of the water is used. How many litres are left?
  14. 14.The price of a bicycle is ₹1720. It goes up by 30%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹1600 to ₹2400. By what percent did it go up?
  16. 16.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  17. 17.A water tank holds 4780 litres. 10% of the water is used. How many litres are left?
  18. 18.The price of a bicycle is ₹660. It goes up by 20%. What is the new price (in ₹)?
  19. 19.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹1720 to ₹2064. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹3940 to ₹3546. By what percent did it come down?
  22. 22.A water tank holds 1180 litres. 5% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹1660 to ₹1743. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹2280 to ₹2052. By what percent did it come down?
  25. 25.A water tank holds 820 litres. 40% of the water is used. How many litres are left?
  26. 26.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  27. 27.The price of a bicycle is ₹4140. It goes up by 15%. What is the new price (in ₹)?
  28. 28.A town has 3000 people. Its population grows by 5%. How many people live there now?
  29. 29.A water tank holds 1360 litres. 15% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹980 to ₹1127. By what percent did it go up?
  31. 31.A water tank holds 3360 litres. 15% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹100 to ₹140. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹3040 to ₹2736. By what percent did it come down?
  34. 34.A water tank holds 1440 litres. 30% of the water is used. How many litres are left?
  35. 35.A shop sells 4780 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  36. 36.A shop sells 2860 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  37. 37.The price of a school bag changes from ₹1460 to ₹1752. By what percent did it go up?
  38. 38.A water tank holds 3500 litres. 40% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹4920 to ₹4428. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹4060 to ₹3857. By what percent did it come down?

Answer key

  1. 47
  2. 3872
  3. 2124
  4. 3381
  5. 15
  6. 1110
  7. 61
  8. 3556
  9. 50
  10. 65
  11. 60
  12. 43.75
  13. 2832
  14. 2236
  15. 50
  16. 95
  17. 4302
  18. 792
  19. 4.5
  20. 20
  21. 10
  22. 1121
  23. 5
  24. 10
  25. 492
  26. 38
  27. 4761
  28. 3150
  29. 1156
  30. 15
  31. 2856
  32. 40
  33. 10
  34. 1008
  35. 5736
  36. 3575
  37. 20
  38. 2100
  39. 10
  40. 5

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