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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 822 · 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 4960 litres. 30% of the water is used. How many litres are left?
  2. 2.A water tank holds 4700 litres. 25% of the water is used. How many litres are left?
  3. 3.A shop sells 2100 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  4. 4.A shop sells 4220 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  5. 5.The price of a bicycle is ₹4700. It goes up by 5%. What is the new price (in ₹)?
  6. 6.The price of a school bag changes from ₹3920 to ₹3136. By what percent did it come down?
  7. 7.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  8. 8.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  9. 9.A town has 600 people. Its population grows by 20%. How many people live there now?
  10. 10.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹4340 to ₹5208. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹2500 to ₹1500. By what percent did it come down?
  13. 13.A shop sells 1220 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  14. 14.A town has 4500 people. Its population grows by 10%. How many people live there now?
  15. 15.A water tank holds 2920 litres. 10% of the water is used. How many litres are left?
  16. 16.A shop sells 4940 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  17. 17.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  18. 18.A water tank holds 4540 litres. 10% of the water is used. How many litres are left?
  19. 19.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  20. 20.The price of a bicycle is ₹3280. It goes up by 25%. What is the new price (in ₹)?
  21. 21.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹4460 to ₹5798. By what percent did it go up?
  23. 23.A shop sells 180 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹100 to ₹85. By what percent did it come down?
  25. 25.A town has 1780 people. Its population grows by 20%. How many people live there now?
  26. 26.A water tank holds 1060 litres. 20% of the water is used. How many litres are left?
  27. 27.A water tank holds 4760 litres. 50% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹3020 to ₹1812. By what percent did it come down?
  29. 29.The price of a bicycle is ₹3160. It goes up by 5%. What is the new price (in ₹)?
  30. 30.A water tank holds 480 litres. 15% of the water is used. How many litres are left?
  31. 31.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  32. 32.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  33. 33.A town has 120 people. Its population grows by 10%. How many people live there now?
  34. 34.A shop sells 5000 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  35. 35.The price of a school bag changes from ₹3580 to ₹3043. By what percent did it come down?
  36. 36.A water tank holds 3420 litres. 10% of the water is used. How many litres are left?
  37. 37.A water tank holds 2380 litres. 15% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹700 to ₹560. By what percent did it come down?
  39. 39.A town has 3440 people. Its population grows by 25%. How many people live there now?
  40. 40.The price of a bicycle is ₹4160. It goes up by 15%. What is the new price (in ₹)?

Answer key

  1. 3472
  2. 3525
  3. 2310
  4. 4853
  5. 4935
  6. 20
  7. 51
  8. 26.5
  9. 720
  10. 57.5
  11. 20
  12. 40
  13. 1708
  14. 4950
  15. 2628
  16. 7410
  17. 56.25
  18. 4086
  19. 57.5
  20. 4100
  21. 12
  22. 30
  23. 216
  24. 15
  25. 2136
  26. 848
  27. 2380
  28. 40
  29. 3318
  30. 408
  31. 43
  32. 10.25
  33. 132
  34. 5500
  35. 15
  36. 3078
  37. 2023
  38. 20
  39. 4300
  40. 4784

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