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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 184 · 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 1980 people. Its population grows by 25%. How many people live there now?
  2. 2.A shop sells 2000 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  3. 3.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 1100 litres. 25% of the water is used. How many litres are left?
  5. 5.A town has 4240 people. Its population grows by 20%. How many people live there now?
  6. 6.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  7. 7.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  8. 8.A town has 500 people. Its population grows by 30%. How many people live there now?
  9. 9.A water tank holds 300 litres. 30% of the water is used. How many litres are left?
  10. 10.A water tank holds 4680 litres. 40% of the water is used. How many litres are left?
  11. 11.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  12. 12.The price of a bicycle is ₹1960. It goes up by 15%. What is the new price (in ₹)?
  13. 13.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹1480 to ₹1924. By what percent did it go up?
  15. 15.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  16. 16.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  17. 17.A water tank holds 4240 litres. 50% of the water is used. How many litres are left?
  18. 18.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹620 to ₹589. By what percent did it come down?
  20. 20.The price of a bicycle is ₹4520. It goes up by 50%. What is the new price (in ₹)?
  21. 21.The price of a bicycle is ₹460. It goes up by 25%. What is the new price (in ₹)?
  22. 22.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  23. 23.The price of a bicycle is ₹500. It goes up by 25%. What is the new price (in ₹)?
  24. 24.The price of a bicycle is ₹3920. It goes up by 30%. What is the new price (in ₹)?
  25. 25.A town has 4040 people. Its population grows by 15%. How many people live there now?
  26. 26.The price of a bicycle is ₹1260. It goes up by 15%. What is the new price (in ₹)?
  27. 27.A town has 1680 people. Its population grows by 20%. How many people live there now?
  28. 28.The price of a school bag changes from ₹1240 to ₹930. By what percent did it come down?
  29. 29.The price of a bicycle is ₹540. It goes up by 20%. What is the new price (in ₹)?
  30. 30.A water tank holds 4140 litres. 20% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹2800 to ₹2660. By what percent did it come down?
  32. 32.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.The price of a school bag changes from ₹660 to ₹990. By what percent did it go up?
  34. 34.A water tank holds 2660 litres. 50% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹380 to ₹532. By what percent did it go up?
  36. 36.A town has 260 people. Its population grows by 5%. How many people live there now?
  37. 37.The price of a bicycle is ₹1860. It goes up by 10%. What is the new price (in ₹)?
  38. 38.A shop sells 1560 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  39. 39.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  40. 40.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =

Answer key

  1. 2475
  2. 2300
  3. 61
  4. 825
  5. 5088
  6. 55
  7. 26
  8. 650
  9. 210
  10. 2808
  11. 56.25
  12. 2254
  13. 6.25
  14. 30
  15. 38
  16. 32.5
  17. 2120
  18. 32
  19. 5
  20. 6780
  21. 575
  22. 96
  23. 625
  24. 5096
  25. 4646
  26. 1449
  27. 2016
  28. 25
  29. 648
  30. 3312
  31. 5
  32. 9.75
  33. 50
  34. 1330
  35. 40
  36. 273
  37. 2046
  38. 2028
  39. 60
  40. 62.5

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