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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 63 · 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 school bag changes from ₹540 to ₹594. By what percent did it go up?
  2. 2.The price of a school bag changes from ₹2320 to ₹3248. By what percent did it go up?
  3. 3.A town has 4860 people. Its population grows by 20%. How many people live there now?
  4. 4.The price of a bicycle is ₹2500. It goes up by 25%. What is the new price (in ₹)?
  5. 5.The price of a bicycle is ₹340. It goes up by 15%. What is the new price (in ₹)?
  6. 6.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  7. 7.The price of a bicycle is ₹2760. It goes up by 25%. What is the new price (in ₹)?
  8. 8.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  9. 9.A water tank holds 3240 litres. 50% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹3900 to ₹4875. By what percent did it go up?
  11. 11.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  12. 12.The price of a school bag changes from ₹2220 to ₹1665. By what percent did it come down?
  13. 13.A water tank holds 380 litres. 20% of the water is used. How many litres are left?
  14. 14.A shop sells 300 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  15. 15.A water tank holds 4940 litres. 10% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹3540 to ₹3186. By what percent did it come down?
  17. 17.A water tank holds 4540 litres. 10% of the water is used. How many litres are left?
  18. 18.A water tank holds 980 litres. 25% of the water is used. How many litres are left?
  19. 19.A shop sells 2160 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  20. 20.The price of a school bag changes from ₹120 to ₹144. By what percent did it go up?
  21. 21.The price of a bicycle is ₹3980. It goes up by 50%. What is the new price (in ₹)?
  22. 22.A water tank holds 4520 litres. 5% of the water is used. How many litres are left?
  23. 23.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 420 litres. 50% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹3140 to ₹3454. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹1340 to ₹1541. By what percent did it go up?
  27. 27.A town has 900 people. Its population grows by 30%. How many people live there now?
  28. 28.A water tank holds 60 litres. 5% of the water is used. How many litres are left?
  29. 29.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  30. 30.The price of a bicycle is ₹4360. It goes up by 50%. What is the new price (in ₹)?
  31. 31.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  32. 32.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  33. 33.A water tank holds 1280 litres. 5% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹2500 to ₹1250. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹4600 to ₹4370. By what percent did it come down?
  36. 36.A town has 1740 people. Its population grows by 20%. How many people live there now?
  37. 37.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  38. 38.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  39. 39.The price of a school bag changes from ₹1680 to ₹1848. By what percent did it go up?
  40. 40.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =

Answer key

  1. 10
  2. 40
  3. 5832
  4. 3125
  5. 391
  6. 51
  7. 3450
  8. 37
  9. 1620
  10. 25
  11. 68
  12. 25
  13. 304
  14. 330
  15. 4446
  16. 10
  17. 4086
  18. 735
  19. 2268
  20. 20
  21. 5970
  22. 4294
  23. 56
  24. 210
  25. 10
  26. 15
  27. 1170
  28. 57
  29. 18.75
  30. 6540
  31. 33.5
  32. 23.5
  33. 1216
  34. 50
  35. 5
  36. 2088
  37. 57.5
  38. 14.5
  39. 10
  40. 68

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