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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 799 · 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 water tank holds 1540 litres. 5% of the water is used. How many litres are left?
  2. 2.A water tank holds 3080 litres. 5% of the water is used. How many litres are left?
  3. 3.A water tank holds 2080 litres. 5% of the water is used. How many litres are left?
  4. 4.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  5. 5.A shop sells 1140 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  6. 6.A water tank holds 560 litres. 40% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹3740 to ₹3179. By what percent did it come down?
  8. 8.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  9. 9.A water tank holds 2060 litres. 15% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹580 to ₹667. By what percent did it go up?
  11. 11.A water tank holds 4360 litres. 50% of the water is used. How many litres are left?
  12. 12.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  13. 13.The price of a school bag changes from ₹1900 to ₹1520. By what percent did it come down?
  14. 14.A water tank holds 2200 litres. 40% of the water is used. How many litres are left?
  15. 15.A water tank holds 3160 litres. 5% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹300 to ₹315. By what percent did it go up?
  17. 17.The price of a bicycle is ₹4620. It goes up by 10%. What is the new price (in ₹)?
  18. 18.A water tank holds 1620 litres. 20% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹540 to ₹378. By what percent did it come down?
  20. 20.The price of a school bag changes from ₹3360 to ₹4032. By what percent did it go up?
  21. 21.A town has 4140 people. Its population grows by 30%. How many people live there now?
  22. 22.A shop sells 2180 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  23. 23.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 1220 litres. 25% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹4340 to ₹6510. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹4480 to ₹4928. By what percent did it go up?
  27. 27.A town has 1260 people. Its population grows by 10%. How many people live there now?
  28. 28.The price of a school bag changes from ₹4640 to ₹4176. By what percent did it come down?
  29. 29.A water tank holds 2060 litres. 5% of the water is used. How many litres are left?
  30. 30.A water tank holds 4860 litres. 40% of the water is used. How many litres are left?
  31. 31.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  32. 32.A water tank holds 1720 litres. 5% of the water is used. How many litres are left?
  33. 33.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  34. 34.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  35. 35.A shop sells 2760 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  36. 36.The price of a school bag changes from ₹1020 to ₹612. By what percent did it come down?
  37. 37.The price of a bicycle is ₹720. It goes up by 5%. What is the new price (in ₹)?
  38. 38.A water tank holds 4180 litres. 25% of the water is used. How many litres are left?
  39. 39.A town has 1540 people. Its population grows by 10%. How many people live there now?
  40. 40.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 1463
  2. 2926
  3. 1976
  4. 56.25
  5. 1710
  6. 336
  7. 15
  8. 26
  9. 1751
  10. 15
  11. 2180
  12. 43
  13. 20
  14. 1320
  15. 3002
  16. 5
  17. 5082
  18. 1296
  19. 30
  20. 20
  21. 5382
  22. 2398
  23. 15.5
  24. 915
  25. 50
  26. 10
  27. 1386
  28. 10
  29. 1957
  30. 2916
  31. 65
  32. 1634
  33. 9.25
  34. 43.75
  35. 2898
  36. 40
  37. 756
  38. 3135
  39. 1694
  40. 37.5

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