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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 558 · 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 shop sells 4220 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  2. 2.The price of a school bag changes from ₹4120 to ₹5150. By what percent did it go up?
  3. 3.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  4. 4.The price of a school bag changes from ₹3560 to ₹4450. By what percent did it go up?
  5. 5.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹1220 to ₹732. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹700 to ₹420. By what percent did it come down?
  8. 8.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  9. 9.A town has 2360 people. Its population grows by 15%. How many people live there now?
  10. 10.A water tank holds 3580 litres. 25% of the water is used. How many litres are left?
  11. 11.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  12. 12.A shop sells 3660 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  13. 13.A water tank holds 3680 litres. 20% of the water is used. How many litres are left?
  14. 14.A water tank holds 1140 litres. 25% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹2220 to ₹2664. By what percent did it go up?
  16. 16.A water tank holds 3940 litres. 20% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹340. It goes up by 50%. What is the new price (in ₹)?
  18. 18.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  19. 19.A shop sells 660 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  20. 20.A water tank holds 4620 litres. 25% of the water is used. How many litres are left?
  21. 21.A water tank holds 1680 litres. 30% of the water is used. How many litres are left?
  22. 22.A shop sells 3660 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  23. 23.The price of a school bag changes from ₹1480 to ₹1776. By what percent did it go up?
  24. 24.A water tank holds 2360 litres. 20% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹4960. It goes up by 10%. What is the new price (in ₹)?
  26. 26.A water tank holds 4680 litres. 20% of the water is used. How many litres are left?
  27. 27.A water tank holds 4060 litres. 50% of the water is used. How many litres are left?
  28. 28.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹540 to ₹567. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹3040 to ₹3648. By what percent did it go up?
  31. 31.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  32. 32.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  33. 33.A town has 1460 people. Its population grows by 10%. How many people live there now?
  34. 34.The price of a school bag changes from ₹3060 to ₹3978. By what percent did it go up?
  35. 35.A water tank holds 3000 litres. 5% of the water is used. How many litres are left?
  36. 36.A water tank holds 480 litres. 5% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹4060. It goes up by 25%. What is the new price (in ₹)?
  38. 38.A town has 920 people. Its population grows by 5%. How many people live there now?
  39. 39.The price of a school bag changes from ₹180 to ₹144. By what percent did it come down?
  40. 40.A water tank holds 2260 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 5908
  2. 25
  3. 95
  4. 25
  5. 49
  6. 40
  7. 40
  8. 2
  9. 2714
  10. 2685
  11. 6.25
  12. 5490
  13. 2944
  14. 855
  15. 20
  16. 3152
  17. 510
  18. 24
  19. 792
  20. 3465
  21. 1176
  22. 4026
  23. 20
  24. 1888
  25. 5456
  26. 3744
  27. 2030
  28. 4
  29. 5
  30. 20
  31. 61
  32. 87.5
  33. 1606
  34. 30
  35. 2850
  36. 456
  37. 5075
  38. 966
  39. 20
  40. 1921

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