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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 884 · 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 ₹1780 to ₹2225. By what percent did it go up?
  2. 2.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  3. 3.The price of a school bag changes from ₹4180 to ₹3762. By what percent did it come down?
  4. 4.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  5. 5.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  6. 6.The price of a bicycle is ₹3760. It goes up by 15%. What is the new price (in ₹)?
  7. 7.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.A town has 4720 people. Its population grows by 25%. How many people live there now?
  9. 9.A shop sells 4880 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  10. 10.A town has 3280 people. Its population grows by 5%. How many people live there now?
  11. 11.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  12. 12.The price of a bicycle is ₹3460. It goes up by 5%. What is the new price (in ₹)?
  13. 13.A water tank holds 1000 litres. 10% of the water is used. How many litres are left?
  14. 14.A water tank holds 1940 litres. 10% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹2140 to ₹1926. By what percent did it come down?
  16. 16.A water tank holds 2940 litres. 5% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹3540. It goes up by 30%. What is the new price (in ₹)?
  18. 18.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  19. 19.A shop sells 440 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  20. 20.A water tank holds 1320 litres. 20% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹2280. It goes up by 20%. What is the new price (in ₹)?
  22. 22.A water tank holds 4700 litres. 25% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹1580 to ₹2370. By what percent did it go up?
  24. 24.A town has 3040 people. Its population grows by 25%. How many people live there now?
  25. 25.A water tank holds 1400 litres. 5% of the water is used. How many litres are left?
  26. 26.A town has 1980 people. Its population grows by 50%. How many people live there now?
  27. 27.The price of a bicycle is ₹4180. It goes up by 10%. What is the new price (in ₹)?
  28. 28.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  29. 29.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  30. 30.A water tank holds 4700 litres. 40% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹160 to ₹240. By what percent did it go up?
  32. 32.A town has 1880 people. Its population grows by 15%. How many people live there now?
  33. 33.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  34. 34.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  35. 35.The price of a bicycle is ₹1240. It goes up by 5%. What is the new price (in ₹)?
  36. 36.A water tank holds 4300 litres. 25% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹3520 to ₹2992. By what percent did it come down?
  38. 38.A water tank holds 540 litres. 50% of the water is used. How many litres are left?
  39. 39.A town has 1240 people. Its population grows by 10%. How many people live there now?
  40. 40.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 25
  2. 40
  3. 10
  4. 32.25
  5. 8
  6. 4324
  7. 32
  8. 5900
  9. 6100
  10. 3444
  11. 31.25
  12. 3633
  13. 900
  14. 1746
  15. 10
  16. 2793
  17. 4602
  18. 19.25
  19. 506
  20. 1056
  21. 2736
  22. 3525
  23. 50
  24. 3800
  25. 1330
  26. 2970
  27. 4598
  28. 36.5
  29. 52.5
  30. 2820
  31. 50
  32. 2162
  33. 15.5
  34. 32
  35. 1302
  36. 3225
  37. 15
  38. 270
  39. 1364
  40. 43

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