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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 922 · 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 ₹240 to ₹288. By what percent did it go up?
  2. 2.A water tank holds 320 litres. 5% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹4820 to ₹7230. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹5000 to ₹5750. By what percent did it go up?
  5. 5.The price of a bicycle is ₹940. It goes up by 20%. What is the new price (in ₹)?
  6. 6.The price of a school bag changes from ₹3660 to ₹2928. By what percent did it come down?
  7. 7.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  8. 8.A town has 160 people. Its population grows by 50%. How many people live there now?
  9. 9.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹860 to ₹602. By what percent did it come down?
  11. 11.The price of a bicycle is ₹4660. It goes up by 40%. What is the new price (in ₹)?
  12. 12.A water tank holds 2540 litres. 30% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹700 to ₹1050. By what percent did it go up?
  14. 14.The price of a bicycle is ₹1700. It goes up by 15%. What is the new price (in ₹)?
  15. 15.A shop sells 4120 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  16. 16.The price of a school bag changes from ₹3240 to ₹1944. By what percent did it come down?
  17. 17.A water tank holds 400 litres. 40% of the water is used. How many litres are left?
  18. 18.A water tank holds 1540 litres. 15% of the water is used. How many litres are left?
  19. 19.A shop sells 3800 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  20. 20.A town has 3520 people. Its population grows by 15%. How many people live there now?
  21. 21.A town has 1580 people. Its population grows by 5%. How many people live there now?
  22. 22.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  23. 23.The price of a bicycle is ₹800. It goes up by 50%. What is the new price (in ₹)?
  24. 24.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  25. 25.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹800 to ₹720. By what percent did it come down?
  27. 27.A town has 260 people. Its population grows by 40%. How many people live there now?
  28. 28.A water tank holds 4520 litres. 20% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹1140 to ₹855. By what percent did it come down?
  30. 30.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  31. 31.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.A water tank holds 2380 litres. 25% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1960 to ₹2744. By what percent did it go up?
  34. 34.The price of a bicycle is ₹4300. It goes up by 10%. What is the new price (in ₹)?
  35. 35.A water tank holds 4100 litres. 10% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹2840 to ₹2982. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹2980 to ₹2533. By what percent did it come down?
  38. 38.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  39. 39.A shop sells 2200 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹240 to ₹276. By what percent did it go up?

Answer key

  1. 20
  2. 304
  3. 50
  4. 15
  5. 1128
  6. 20
  7. 58
  8. 240
  9. 23.5
  10. 30
  11. 6524
  12. 1778
  13. 50
  14. 1955
  15. 4944
  16. 40
  17. 240
  18. 1309
  19. 3990
  20. 4048
  21. 1659
  22. 57.5
  23. 1200
  24. 61
  25. 54
  26. 10
  27. 364
  28. 3616
  29. 25
  30. 21
  31. 9.75
  32. 1785
  33. 40
  34. 4730
  35. 3690
  36. 5
  37. 15
  38. 26.5
  39. 3080
  40. 15

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