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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 407 · 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 2660 litres. 25% of the water is used. How many litres are left?
  2. 2.A town has 4080 people. Its population grows by 20%. How many people live there now?
  3. 3.The price of a school bag changes from ₹3120 to ₹3588. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹4400 to ₹5280. By what percent did it go up?
  5. 5.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  6. 6.A water tank holds 460 litres. 5% of the water is used. How many litres are left?
  7. 7.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 760 litres. 5% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹1380 to ₹1242. By what percent did it come down?
  10. 10.A water tank holds 3960 litres. 15% of the water is used. How many litres are left?
  11. 11.A town has 400 people. Its population grows by 25%. How many people live there now?
  12. 12.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  13. 13.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  14. 14.A water tank holds 3360 litres. 10% of the water is used. How many litres are left?
  15. 15.A shop sells 680 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  16. 16.The price of a school bag changes from ₹1780 to ₹2047. By what percent did it go up?
  17. 17.A water tank holds 1100 litres. 50% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹1260 to ₹1449. By what percent did it go up?
  19. 19.A water tank holds 100 litres. 15% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹4960 to ₹4464. By what percent did it come down?
  21. 21.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  23. 23.The price of a school bag changes from ₹980 to ₹784. By what percent did it come down?
  24. 24.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹2680 to ₹1340. By what percent did it come down?
  26. 26.A water tank holds 1720 litres. 10% of the water is used. How many litres are left?
  27. 27.A shop sells 3860 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  28. 28.The price of a school bag changes from ₹140 to ₹98. By what percent did it come down?
  29. 29.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹340 to ₹170. By what percent did it come down?
  31. 31.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  32. 32.A water tank holds 4340 litres. 20% of the water is used. How many litres are left?
  33. 33.The price of a bicycle is ₹2040. It goes up by 50%. What is the new price (in ₹)?
  34. 34.A shop sells 3060 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  35. 35.A water tank holds 3500 litres. 30% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹620 to ₹775. By what percent did it go up?
  37. 37.The price of a bicycle is ₹4660. It goes up by 5%. What is the new price (in ₹)?
  38. 38.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  39. 39.A water tank holds 4400 litres. 30% of the water is used. How many litres are left?
  40. 40.A water tank holds 1820 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 1995
  2. 4896
  3. 15
  4. 20
  5. 72.5
  6. 437
  7. 54
  8. 722
  9. 10
  10. 3366
  11. 500
  12. 65
  13. 50
  14. 3024
  15. 884
  16. 15
  17. 550
  18. 15
  19. 85
  20. 10
  21. 26
  22. 52.5
  23. 20
  24. 33.5
  25. 50
  26. 1548
  27. 5404
  28. 30
  29. 96
  30. 50
  31. 55
  32. 3472
  33. 3060
  34. 3978
  35. 2450
  36. 25
  37. 4893
  38. 36.25
  39. 3080
  40. 1365

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