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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 997 · 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 3080 people. Its population grows by 20%. How many people live there now?
  2. 2.A water tank holds 4260 litres. 10% of the water is used. How many litres are left?
  3. 3.A water tank holds 880 litres. 10% of the water is used. How many litres are left?
  4. 4.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹3380 to ₹3887. By what percent did it go up?
  6. 6.A town has 1560 people. Its population grows by 10%. How many people live there now?
  7. 7.A water tank holds 2440 litres. 25% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹3880 to ₹4074. By what percent did it go up?
  9. 9.A water tank holds 780 litres. 30% of the water is used. How many litres are left?
  10. 10.A water tank holds 440 litres. 30% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹1180 to ₹1475. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹2300 to ₹1840. By what percent did it come down?
  13. 13.A shop sells 4820 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  14. 14.A water tank holds 2620 litres. 5% of the water is used. How many litres are left?
  15. 15.A shop sells 400 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  16. 16.The price of a school bag changes from ₹1420 to ₹1562. By what percent did it go up?
  17. 17.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  18. 18.A shop sells 3760 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  19. 19.A water tank holds 4120 litres. 5% of the water is used. How many litres are left?
  20. 20.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  21. 21.A town has 480 people. Its population grows by 15%. How many people live there now?
  22. 22.A water tank holds 3360 litres. 40% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹180. It goes up by 5%. What is the new price (in ₹)?
  24. 24.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹600 to ₹660. By what percent did it go up?
  26. 26.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  27. 27.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  28. 28.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  29. 29.A water tank holds 4180 litres. 20% of the water is used. How many litres are left?
  30. 30.A water tank holds 3240 litres. 5% of the water is used. How many litres are left?
  31. 31.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  32. 32.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A water tank holds 1840 litres. 50% of the water is used. How many litres are left?
  34. 34.A town has 1660 people. Its population grows by 30%. How many people live there now?
  35. 35.A water tank holds 2860 litres. 25% of the water is used. How many litres are left?
  36. 36.A water tank holds 4300 litres. 50% of the water is used. How many litres are left?
  37. 37.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  38. 38.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  39. 39.A water tank holds 4720 litres. 20% of the water is used. How many litres are left?
  40. 40.The price of a bicycle is ₹2480. It goes up by 30%. What is the new price (in ₹)?

Answer key

  1. 3696
  2. 3834
  3. 792
  4. 37.5
  5. 15
  6. 1716
  7. 1830
  8. 5
  9. 546
  10. 308
  11. 25
  12. 20
  13. 5543
  14. 2489
  15. 440
  16. 10
  17. 55
  18. 4700
  19. 3914
  20. 20.75
  21. 552
  22. 2016
  23. 189
  24. 20
  25. 10
  26. 52.5
  27. 54
  28. 46
  29. 3344
  30. 3078
  31. 23.5
  32. 14.5
  33. 920
  34. 2158
  35. 2145
  36. 2150
  37. 36.25
  38. 27.75
  39. 3776
  40. 3224

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