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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 809 · 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 town has 4720 people. Its population grows by 10%. How many people live there now?
  2. 2.A town has 3900 people. Its population grows by 20%. How many people live there now?
  3. 3.The price of a bicycle is ₹1780. It goes up by 25%. What is the new price (in ₹)?
  4. 4.The price of a bicycle is ₹4100. It goes up by 30%. What is the new price (in ₹)?
  5. 5.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹3280 to ₹2296. By what percent did it come down?
  7. 7.A shop sells 1920 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  8. 8.A town has 4840 people. Its population grows by 10%. How many people live there now?
  9. 9.A shop sells 680 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  10. 10.The price of a school bag changes from ₹1740 to ₹2175. By what percent did it go up?
  11. 11.A town has 3180 people. Its population grows by 25%. How many people live there now?
  12. 12.A water tank holds 2140 litres. 5% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹3860 to ₹4439. By what percent did it go up?
  14. 14.A water tank holds 1180 litres. 5% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹3800 to ₹5700. By what percent did it go up?
  16. 16.The price of a bicycle is ₹2140. It goes up by 50%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹3160 to ₹3792. By what percent did it go up?
  18. 18.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  19. 19.A town has 80 people. Its population grows by 20%. How many people live there now?
  20. 20.A town has 1020 people. Its population grows by 10%. How many people live there now?
  21. 21.A water tank holds 840 litres. 40% of the water is used. How many litres are left?
  22. 22.A water tank holds 4660 litres. 10% of the water is used. How many litres are left?
  23. 23.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  24. 24.The price of a school bag changes from ₹1100 to ₹1155. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹3440 to ₹4128. By what percent did it go up?
  26. 26.A shop sells 3920 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  27. 27.A town has 780 people. Its population grows by 10%. How many people live there now?
  28. 28.The price of a school bag changes from ₹2660 to ₹2261. By what percent did it come down?
  29. 29.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  30. 30.A water tank holds 4900 litres. 15% of the water is used. How many litres are left?
  31. 31.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  32. 32.The price of a bicycle is ₹4760. It goes up by 15%. What is the new price (in ₹)?
  33. 33.A water tank holds 2380 litres. 25% of the water is used. How many litres are left?
  34. 34.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  35. 35.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  36. 36.The price of a bicycle is ₹860. It goes up by 30%. What is the new price (in ₹)?
  37. 37.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.A water tank holds 280 litres. 50% of the water is used. How many litres are left?
  39. 39.A water tank holds 4600 litres. 15% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹3820 to ₹4966. By what percent did it go up?

Answer key

  1. 5192
  2. 4680
  3. 2225
  4. 5330
  5. 24
  6. 30
  7. 2112
  8. 5324
  9. 816
  10. 25
  11. 3975
  12. 2033
  13. 15
  14. 1121
  15. 50
  16. 3210
  17. 20
  18. 82
  19. 96
  20. 1122
  21. 504
  22. 4194
  23. 28
  24. 5
  25. 20
  26. 4900
  27. 858
  28. 15
  29. 32
  30. 4165
  31. 21
  32. 5474
  33. 1785
  34. 37.5
  35. 55
  36. 1118
  37. 31.25
  38. 140
  39. 3910
  40. 30

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