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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 238 · 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 4340 litres. 40% of the water is used. How many litres are left?
  2. 2.A shop sells 3820 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  3. 3.A water tank holds 1060 litres. 30% of the water is used. How many litres are left?
  4. 4.A town has 1320 people. Its population grows by 40%. How many people live there now?
  5. 5.A town has 2180 people. Its population grows by 5%. How many people live there now?
  6. 6.A shop sells 3120 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  7. 7.A water tank holds 1340 litres. 20% of the water is used. How many litres are left?
  8. 8.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  9. 9.A shop sells 120 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  10. 10.The price of a bicycle is ₹2360. It goes up by 25%. What is the new price (in ₹)?
  11. 11.A water tank holds 3260 litres. 10% of the water is used. How many litres are left?
  12. 12.The price of a bicycle is ₹1300. It goes up by 15%. What is the new price (in ₹)?
  13. 13.The price of a school bag changes from ₹200 to ₹120. By what percent did it come down?
  14. 14.A shop sells 4340 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  15. 15.A shop sells 2080 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  16. 16.A town has 1440 people. Its population grows by 10%. How many people live there now?
  17. 17.A town has 3920 people. Its population grows by 5%. How many people live there now?
  18. 18.The price of a school bag changes from ₹1480 to ₹1776. By what percent did it go up?
  19. 19.A town has 2800 people. Its population grows by 5%. How many people live there now?
  20. 20.The price of a bicycle is ₹140. It goes up by 40%. What is the new price (in ₹)?
  21. 21.The price of a school bag changes from ₹2620 to ₹1965. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹3980 to ₹3383. By what percent did it come down?
  23. 23.A water tank holds 560 litres. 5% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹2740 to ₹2877. By what percent did it go up?
  25. 25.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  26. 26.A water tank holds 520 litres. 5% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹2760 to ₹2070. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹5000 to ₹4250. By what percent did it come down?
  29. 29.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹3180 to ₹2862. By what percent did it come down?
  31. 31.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  32. 32.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  33. 33.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  34. 34.A town has 4120 people. Its population grows by 20%. How many people live there now?
  35. 35.The price of a school bag changes from ₹1560 to ₹1872. By what percent did it go up?
  36. 36.A water tank holds 3680 litres. 25% of the water is used. How many litres are left?
  37. 37.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  38. 38.A water tank holds 760 litres. 40% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹2820 to ₹3948. By what percent did it go up?
  40. 40.The price of a school bag changes from ₹1940 to ₹1358. By what percent did it come down?

Answer key

  1. 2604
  2. 5348
  3. 742
  4. 1848
  5. 2289
  6. 3276
  7. 1072
  8. 62.5
  9. 144
  10. 2950
  11. 2934
  12. 1495
  13. 40
  14. 4774
  15. 2600
  16. 1584
  17. 4116
  18. 20
  19. 2940
  20. 196
  21. 25
  22. 15
  23. 532
  24. 5
  25. 38
  26. 494
  27. 25
  28. 15
  29. 80
  30. 10
  31. 28
  32. 61
  33. 3.5
  34. 4944
  35. 20
  36. 2760
  37. 27.75
  38. 456
  39. 40
  40. 30

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