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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 795 · 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 price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  2. 2.A water tank holds 4320 litres. 25% of the water is used. How many litres are left?
  3. 3.A water tank holds 300 litres. 40% of the water is used. How many litres are left?
  4. 4.A town has 3780 people. Its population grows by 30%. How many people live there now?
  5. 5.A water tank holds 780 litres. 25% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹4660 to ₹3961. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹4500 to ₹3150. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹1920 to ₹2304. By what percent did it go up?
  9. 9.A water tank holds 4040 litres. 10% of the water is used. How many litres are left?
  10. 10.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  11. 11.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  12. 12.A water tank holds 1960 litres. 30% of the water is used. How many litres are left?
  13. 13.A shop sells 2840 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  14. 14.A water tank holds 1060 litres. 15% of the water is used. How many litres are left?
  15. 15.The price of a bicycle is ₹4200. It goes up by 15%. What is the new price (in ₹)?
  16. 16.The price of a bicycle is ₹720. It goes up by 10%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹3520. It goes up by 15%. What is the new price (in ₹)?
  18. 18.The price of a bicycle is ₹1280. It goes up by 10%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹2420 to ₹3146. By what percent did it go up?
  20. 20.A water tank holds 1000 litres. 5% of the water is used. How many litres are left?
  21. 21.A water tank holds 1560 litres. 20% of the water is used. How many litres are left?
  22. 22.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 2660 litres. 10% of the water is used. How many litres are left?
  24. 24.A town has 1160 people. Its population grows by 15%. How many people live there now?
  25. 25.A town has 4300 people. Its population grows by 15%. How many people live there now?
  26. 26.A town has 160 people. Its population grows by 50%. How many people live there now?
  27. 27.The price of a bicycle is ₹1140. It goes up by 50%. What is the new price (in ₹)?
  28. 28.A shop sells 4280 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  29. 29.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  30. 30.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  31. 31.The price of a bicycle is ₹2160. It goes up by 15%. What is the new price (in ₹)?
  32. 32.A water tank holds 2040 litres. 10% of the water is used. How many litres are left?
  33. 33.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  34. 34.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  35. 35.The price of a school bag changes from ₹3180 to ₹4134. By what percent did it go up?
  36. 36.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  37. 37.The price of a school bag changes from ₹3740 to ₹3179. By what percent did it come down?
  38. 38.The price of a bicycle is ₹780. It goes up by 15%. What is the new price (in ₹)?
  39. 39.The price of a bicycle is ₹1540. It goes up by 5%. What is the new price (in ₹)?
  40. 40.A town has 3940 people. Its population grows by 30%. How many people live there now?

Answer key

  1. 75
  2. 3240
  3. 180
  4. 4914
  5. 585
  6. 15
  7. 30
  8. 20
  9. 3636
  10. 47.5
  11. 40
  12. 1372
  13. 3692
  14. 901
  15. 4830
  16. 792
  17. 4048
  18. 1408
  19. 30
  20. 950
  21. 1248
  22. 68
  23. 2394
  24. 1334
  25. 4945
  26. 240
  27. 1710
  28. 4708
  29. 26.5
  30. 9.75
  31. 2484
  32. 1836
  33. 58
  34. 47
  35. 30
  36. 32.5
  37. 15
  38. 897
  39. 1617
  40. 5122

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