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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 449 · 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 price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  2. 2.The price of a bicycle is ₹1120. It goes up by 20%. What is the new price (in ₹)?
  3. 3.A water tank holds 3900 litres. 25% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹1000 to ₹700. By what percent did it come down?
  5. 5.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  6. 6.A shop sells 860 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  7. 7.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  8. 8.The price of a school bag changes from ₹3400 to ₹2550. By what percent did it come down?
  9. 9.A town has 4900 people. Its population grows by 20%. How many people live there now?
  10. 10.A water tank holds 2960 litres. 25% of the water is used. How many litres are left?
  11. 11.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  12. 12.A water tank holds 1580 litres. 40% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹4760 to ₹6664. By what percent did it go up?
  14. 14.A town has 540 people. Its population grows by 10%. How many people live there now?
  15. 15.A water tank holds 620 litres. 40% of the water is used. How many litres are left?
  16. 16.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹2580 to ₹2967. By what percent did it go up?
  18. 18.A water tank holds 660 litres. 20% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹4600 to ₹5750. By what percent did it go up?
  20. 20.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹1700 to ₹1870. By what percent did it go up?
  22. 22.The price of a bicycle is ₹3380. It goes up by 30%. What is the new price (in ₹)?
  23. 23.A water tank holds 1700 litres. 25% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹2860 to ₹1716. By what percent did it come down?
  25. 25.A water tank holds 1420 litres. 30% of the water is used. How many litres are left?
  26. 26.A town has 4200 people. Its population grows by 15%. How many people live there now?
  27. 27.A water tank holds 3940 litres. 50% of the water is used. How many litres are left?
  28. 28.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  29. 29.The price of a school bag changes from ₹1480 to ₹1406. By what percent did it come down?
  30. 30.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  31. 31.A town has 180 people. Its population grows by 5%. How many people live there now?
  32. 32.A town has 520 people. Its population grows by 5%. How many people live there now?
  33. 33.A water tank holds 4760 litres. 5% of the water is used. How many litres are left?
  34. 34.A town has 2500 people. Its population grows by 25%. How many people live there now?
  35. 35.A town has 3420 people. Its population grows by 15%. How many people live there now?
  36. 36.A town has 820 people. Its population grows by 20%. How many people live there now?
  37. 37.A water tank holds 700 litres. 20% of the water is used. How many litres are left?
  38. 38.A water tank holds 1320 litres. 10% of the water is used. How many litres are left?
  39. 39.A water tank holds 720 litres. 40% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹4580 to ₹5725. By what percent did it go up?

Answer key

  1. 55
  2. 1344
  3. 2925
  4. 30
  5. 43
  6. 1118
  7. 23.5
  8. 25
  9. 5880
  10. 2220
  11. 65
  12. 948
  13. 40
  14. 594
  15. 372
  16. 14.5
  17. 15
  18. 528
  19. 25
  20. 68
  21. 10
  22. 4394
  23. 1275
  24. 40
  25. 994
  26. 4830
  27. 1970
  28. 52
  29. 5
  30. 28.75
  31. 189
  32. 546
  33. 4522
  34. 3125
  35. 3933
  36. 984
  37. 560
  38. 1188
  39. 432
  40. 25

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