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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 128 · 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 water tank holds 800 litres. 15% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹4920 to ₹6396. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹3140 to ₹4396. By what percent did it go up?
  4. 4.A water tank holds 260 litres. 20% of the water is used. How many litres are left?
  5. 5.A shop sells 300 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  6. 6.A water tank holds 1060 litres. 40% of the water is used. How many litres are left?
  7. 7.A water tank holds 3120 litres. 50% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1100 to ₹935. By what percent did it come down?
  9. 9.A water tank holds 4440 litres. 40% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹3120 to ₹2496. By what percent did it come down?
  11. 11.A water tank holds 1800 litres. 5% of the water is used. How many litres are left?
  12. 12.A shop sells 2420 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  13. 13.The price of a bicycle is ₹400. It goes up by 15%. What is the new price (in ₹)?
  14. 14.A water tank holds 340 litres. 10% of the water is used. How many litres are left?
  15. 15.A town has 1880 people. Its population grows by 15%. How many people live there now?
  16. 16.A town has 3520 people. Its population grows by 25%. How many people live there now?
  17. 17.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  18. 18.A water tank holds 100 litres. 5% of the water is used. How many litres are left?
  19. 19.A water tank holds 80 litres. 20% of the water is used. How many litres are left?
  20. 20.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  21. 21.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  22. 22.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  23. 23.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  24. 24.A shop sells 4520 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  25. 25.A town has 4880 people. Its population grows by 30%. How many people live there now?
  26. 26.A shop sells 3480 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  27. 27.A water tank holds 1320 litres. 15% of the water is used. How many litres are left?
  28. 28.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  29. 29.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  30. 30.The price of a school bag changes from ₹460 to ₹575. By what percent did it go up?
  31. 31.A water tank holds 1980 litres. 20% of the water is used. How many litres are left?
  32. 32.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  33. 33.A shop sells 2960 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  34. 34.The price of a school bag changes from ₹120 to ₹102. By what percent did it come down?
  35. 35.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  36. 36.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  37. 37.The price of a school bag changes from ₹3460 to ₹4844. By what percent did it go up?
  38. 38.The price of a bicycle is ₹520. It goes up by 10%. What is the new price (in ₹)?
  39. 39.The price of a school bag changes from ₹2860 to ₹3003. By what percent did it go up?
  40. 40.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =

Answer key

  1. 680
  2. 30
  3. 40
  4. 208
  5. 390
  6. 636
  7. 1560
  8. 15
  9. 2664
  10. 20
  11. 1710
  12. 3388
  13. 460
  14. 306
  15. 2162
  16. 4400
  17. 28.75
  18. 95
  19. 64
  20. 32.25
  21. 26
  22. 20.75
  23. 33
  24. 5876
  25. 6344
  26. 3654
  27. 1122
  28. 95
  29. 47.5
  30. 25
  31. 1584
  32. 33.5
  33. 3404
  34. 15
  35. 82
  36. 46
  37. 40
  38. 572
  39. 5
  40. 43

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