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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 987 · 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 4880 litres. 10% of the water is used. How many litres are left?
  2. 2.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  3. 3.A town has 1440 people. Its population grows by 30%. How many people live there now?
  4. 4.A water tank holds 1160 litres. 50% of the water is used. How many litres are left?
  5. 5.A shop sells 4780 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  6. 6.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  7. 7.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  8. 8.The price of a school bag changes from ₹2240 to ₹1792. By what percent did it come down?
  9. 9.A town has 1800 people. Its population grows by 15%. How many people live there now?
  10. 10.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹1340 to ₹1206. By what percent did it come down?
  12. 12.A water tank holds 1340 litres. 30% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹2440 to ₹3172. By what percent did it go up?
  14. 14.A water tank holds 4380 litres. 30% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹1980 to ₹1386. By what percent did it come down?
  16. 16.A water tank holds 1000 litres. 20% of the water is used. How many litres are left?
  17. 17.A water tank holds 3980 litres. 10% of the water is used. How many litres are left?
  18. 18.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  19. 19.A water tank holds 1760 litres. 20% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹3860 to ₹2895. By what percent did it come down?
  21. 21.The price of a bicycle is ₹2340. It goes up by 30%. What is the new price (in ₹)?
  22. 22.The price of a bicycle is ₹2460. It goes up by 25%. What is the new price (in ₹)?
  23. 23.A shop sells 1820 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 ₹2680 to ₹1340. By what percent did it come down?
  25. 25.The price of a bicycle is ₹1140. It goes up by 10%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹700 to ₹875. By what percent did it go up?
  27. 27.A town has 2300 people. Its population grows by 40%. How many people live there now?
  28. 28.A water tank holds 3640 litres. 30% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹4260. It goes up by 50%. What is the new price (in ₹)?
  30. 30.The price of a bicycle is ₹4360. It goes up by 25%. What is the new price (in ₹)?
  31. 31.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  32. 32.The price of a school bag changes from ₹1740 to ₹2610. By what percent did it go up?
  33. 33.The price of a bicycle is ₹1120. It goes up by 10%. What is the new price (in ₹)?
  34. 34.A water tank holds 3300 litres. 20% of the water is used. How many litres are left?
  35. 35.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  36. 36.A town has 540 people. Its population grows by 25%. How many people live there now?
  37. 37.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  38. 38.The price of a bicycle is ₹4100. It goes up by 25%. What is the new price (in ₹)?
  39. 39.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  40. 40.The price of a bicycle is ₹100. It goes up by 40%. What is the new price (in ₹)?

Answer key

  1. 4392
  2. 47
  3. 1872
  4. 580
  5. 5019
  6. 27.75
  7. 55
  8. 20
  9. 2070
  10. 9.75
  11. 10
  12. 938
  13. 30
  14. 3066
  15. 30
  16. 800
  17. 3582
  18. 55
  19. 1408
  20. 25
  21. 3042
  22. 3075
  23. 2184
  24. 50
  25. 1254
  26. 25
  27. 3220
  28. 2548
  29. 6390
  30. 5450
  31. 40
  32. 50
  33. 1232
  34. 2640
  35. 24
  36. 675
  37. 82
  38. 5125
  39. 54
  40. 140

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