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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 805 · 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 town has 2300 people. Its population grows by 30%. How many people live there now?
  2. 2.The price of a school bag changes from ₹4220 to ₹3165. By what percent did it come down?
  3. 3.The price of a bicycle is ₹4700. It goes up by 5%. What is the new price (in ₹)?
  4. 4.The price of a bicycle is ₹4740. It goes up by 40%. What is the new price (in ₹)?
  5. 5.A water tank holds 100 litres. 50% of the water is used. How many litres are left?
  6. 6.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  7. 7.A shop sells 2420 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  8. 8.A shop sells 60 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  9. 9.A water tank holds 820 litres. 10% of the water is used. How many litres are left?
  10. 10.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 2360 litres. 40% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹360 to ₹396. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹4420 to ₹3536. By what percent did it come down?
  14. 14.A water tank holds 3580 litres. 5% of the water is used. How many litres are left?
  15. 15.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  16. 16.A water tank holds 3900 litres. 20% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹4200. It goes up by 15%. What is the new price (in ₹)?
  18. 18.The price of a bicycle is ₹1440. It goes up by 25%. What is the new price (in ₹)?
  19. 19.A town has 580 people. Its population grows by 5%. How many people live there now?
  20. 20.The price of a school bag changes from ₹2200 to ₹1980. By what percent did it come down?
  21. 21.The price of a school bag changes from ₹3260 to ₹4564. By what percent did it go up?
  22. 22.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  23. 23.The price of a bicycle is ₹160. It goes up by 30%. What is the new price (in ₹)?
  24. 24.A water tank holds 2800 litres. 30% of the water is used. How many litres are left?
  25. 25.A water tank holds 4360 litres. 5% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹4980 to ₹4233. By what percent did it come down?
  27. 27.A water tank holds 660 litres. 25% of the water is used. How many litres are left?
  28. 28.A shop sells 4680 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  29. 29.A water tank holds 2640 litres. 30% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹100 to ₹75. By what percent did it come down?
  31. 31.A water tank holds 580 litres. 15% of the water is used. How many litres are left?
  32. 32.A water tank holds 1580 litres. 10% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1640 to ₹1476. By what percent did it come down?
  34. 34.The price of a bicycle is ₹4700. It goes up by 20%. What is the new price (in ₹)?
  35. 35.A water tank holds 520 litres. 50% of the water is used. How many litres are left?
  36. 36.A water tank holds 480 litres. 25% of the water is used. How many litres are left?
  37. 37.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  38. 38.A town has 3460 people. Its population grows by 15%. How many people live there now?
  39. 39.The price of a school bag changes from ₹2440 to ₹1220. By what percent did it come down?
  40. 40.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =

Answer key

  1. 2990
  2. 25
  3. 4935
  4. 6636
  5. 50
  6. 110
  7. 2783
  8. 75
  9. 738
  10. 43.75
  11. 1416
  12. 10
  13. 20
  14. 3401
  15. 46
  16. 3120
  17. 4830
  18. 1800
  19. 609
  20. 10
  21. 40
  22. 18.75
  23. 208
  24. 1960
  25. 4142
  26. 15
  27. 495
  28. 5850
  29. 1848
  30. 25
  31. 493
  32. 1422
  33. 10
  34. 5640
  35. 260
  36. 360
  37. 32
  38. 3979
  39. 50
  40. 57.5

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