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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 620 · 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 ₹2620 to ₹1965. By what percent did it come down?
  2. 2.A water tank holds 1960 litres. 50% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹2320 to ₹3016. By what percent did it go up?
  4. 4.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  5. 5.A water tank holds 4340 litres. 30% of the water is used. How many litres are left?
  6. 6.A shop sells 4840 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  7. 7.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹960 to ₹1200. By what percent did it go up?
  9. 9.The price of a bicycle is ₹2700. It goes up by 40%. What is the new price (in ₹)?
  10. 10.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  11. 11.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  12. 12.A town has 1480 people. Its population grows by 15%. How many people live there now?
  13. 13.The price of a school bag changes from ₹3060 to ₹4284. By what percent did it go up?
  14. 14.A water tank holds 1400 litres. 5% of the water is used. How many litres are left?
  15. 15.A water tank holds 4280 litres. 5% of the water is used. How many litres are left?
  16. 16.A water tank holds 4580 litres. 10% of the water is used. How many litres are left?
  17. 17.A town has 4720 people. Its population grows by 10%. How many people live there now?
  18. 18.A water tank holds 2140 litres. 40% of the water is used. How many litres are left?
  19. 19.A town has 1280 people. Its population grows by 20%. How many people live there now?
  20. 20.A water tank holds 2460 litres. 50% of the water is used. How many litres are left?
  21. 21.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 4580 litres. 50% of the water is used. How many litres are left?
  23. 23.A water tank holds 520 litres. 5% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹4460 to ₹5129. By what percent did it go up?
  25. 25.A water tank holds 2800 litres. 30% of the water is used. How many litres are left?
  26. 26.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  27. 27.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  28. 28.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  29. 29.A town has 3480 people. Its population grows by 5%. How many people live there now?
  30. 30.The price of a bicycle is ₹3340. It goes up by 10%. What is the new price (in ₹)?
  31. 31.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹4800 to ₹4080. By what percent did it come down?
  33. 33.The price of a school bag changes from ₹2080 to ₹1872. By what percent did it come down?
  34. 34.The price of a bicycle is ₹2180. It goes up by 30%. What is the new price (in ₹)?
  35. 35.A water tank holds 60 litres. 30% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹2600. It goes up by 20%. What is the new price (in ₹)?
  37. 37.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  38. 38.A water tank holds 1220 litres. 10% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹2340 to ₹1872. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹4400 to ₹5060. By what percent did it go up?

Answer key

  1. 25
  2. 980
  3. 30
  4. 55
  5. 3038
  6. 7260
  7. 42.5
  8. 25
  9. 3780
  10. 9.25
  11. 54
  12. 1702
  13. 40
  14. 1330
  15. 4066
  16. 4122
  17. 5192
  18. 1284
  19. 1536
  20. 1230
  21. 80
  22. 2290
  23. 494
  24. 15
  25. 1960
  26. 64
  27. 44
  28. 19.25
  29. 3654
  30. 3674
  31. 26.5
  32. 15
  33. 10
  34. 2834
  35. 42
  36. 3120
  37. 24
  38. 1098
  39. 20
  40. 15

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