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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 595 · 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 ₹4020 to ₹2814. By what percent did it come down?
  2. 2.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  3. 3.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  4. 4.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  5. 5.A shop sells 980 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  6. 6.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  7. 7.A town has 4440 people. Its population grows by 10%. How many people live there now?
  8. 8.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  9. 9.A town has 1360 people. Its population grows by 50%. How many people live there now?
  10. 10.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹3080 to ₹2464. By what percent did it come down?
  12. 12.A shop sells 3600 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  13. 13.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹700 to ₹770. By what percent did it go up?
  15. 15.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  16. 16.A town has 2380 people. Its population grows by 10%. How many people live there now?
  17. 17.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹300 to ₹315. By what percent did it go up?
  20. 20.A water tank holds 1580 litres. 20% of the water is used. How many litres are left?
  21. 21.A shop sells 1060 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  22. 22.A water tank holds 1200 litres. 10% of the water is used. How many litres are left?
  23. 23.A water tank holds 580 litres. 15% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹260 to ₹312. By what percent did it go up?
  25. 25.A water tank holds 2940 litres. 10% of the water is used. How many litres are left?
  26. 26.A water tank holds 3420 litres. 10% of the water is used. How many litres are left?
  27. 27.A water tank holds 4100 litres. 50% of the water is used. How many litres are left?
  28. 28.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  29. 29.The price of a school bag changes from ₹3620 to ₹5430. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹180 to ₹153. By what percent did it come down?
  31. 31.The price of a bicycle is ₹4500. It goes up by 40%. What is the new price (in ₹)?
  32. 32.A water tank holds 1140 litres. 25% of the water is used. How many litres are left?
  33. 33.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  34. 34.The price of a bicycle is ₹4960. It goes up by 10%. What is the new price (in ₹)?
  35. 35.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  36. 36.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  37. 37.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  38. 38.A water tank holds 720 litres. 5% of the water is used. How many litres are left?
  39. 39.A town has 2680 people. Its population grows by 50%. How many people live there now?
  40. 40.A water tank holds 2280 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 30
  2. 27.5
  3. 64
  4. 43
  5. 1274
  6. 32.5
  7. 4884
  8. 44
  9. 2040
  10. 44
  11. 20
  12. 4500
  13. 56
  14. 10
  15. 14
  16. 2618
  17. 20.75
  18. 96
  19. 5
  20. 1264
  21. 1325
  22. 1080
  23. 493
  24. 20
  25. 2646
  26. 3078
  27. 2050
  28. 40
  29. 50
  30. 15
  31. 6300
  32. 855
  33. 42.5
  34. 5456
  35. 4.5
  36. 26
  37. 55
  38. 684
  39. 4020
  40. 1596

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