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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 272 · 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 2100 litres. 10% of the water is used. How many litres are left?
  2. 2.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 4300 litres. 40% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹3300 to ₹3795. By what percent did it go up?
  5. 5.A shop sells 2780 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  6. 6.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  7. 7.A water tank holds 4320 litres. 10% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1580 to ₹790. By what percent did it come down?
  9. 9.The price of a bicycle is ₹5000. It goes up by 50%. What is the new price (in ₹)?
  10. 10.A water tank holds 140 litres. 5% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹1420 to ₹1846. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹4780 to ₹2868. By what percent did it come down?
  13. 13.The price of a school bag changes from ₹340 to ₹255. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹2640 to ₹2904. By what percent did it go up?
  15. 15.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  16. 16.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹4440 to ₹3774. By what percent did it come down?
  18. 18.The price of a school bag changes from ₹3300 to ₹4950. By what percent did it go up?
  19. 19.A town has 3780 people. Its population grows by 50%. How many people live there now?
  20. 20.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  21. 21.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  22. 22.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  23. 23.The price of a school bag changes from ₹3700 to ₹3330. By what percent did it come down?
  24. 24.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  25. 25.A water tank holds 940 litres. 40% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹4200 to ₹3150. By what percent did it come down?
  27. 27.A town has 2080 people. Its population grows by 15%. How many people live there now?
  28. 28.A water tank holds 3060 litres. 10% of the water is used. How many litres are left?
  29. 29.A town has 4460 people. Its population grows by 50%. How many people live there now?
  30. 30.A water tank holds 1980 litres. 25% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹540 to ₹594. By what percent did it go up?
  32. 32.The price of a bicycle is ₹3040. It goes up by 10%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹2280 to ₹2964. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹2900 to ₹3625. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹3320 to ₹2324. By what percent did it come down?
  36. 36.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  37. 37.A water tank holds 1720 litres. 30% of the water is used. How many litres are left?
  38. 38.The price of a bicycle is ₹1880. It goes up by 50%. What is the new price (in ₹)?
  39. 39.A town has 1520 people. Its population grows by 25%. How many people live there now?
  40. 40.The price of a school bag changes from ₹4800 to ₹4080. By what percent did it come down?

Answer key

  1. 1890
  2. 82
  3. 2580
  4. 15
  5. 4170
  6. 23.5
  7. 3888
  8. 50
  9. 7500
  10. 133
  11. 30
  12. 40
  13. 25
  14. 10
  15. 44
  16. 55
  17. 15
  18. 50
  19. 5670
  20. 47.5
  21. 40.5
  22. 9.25
  23. 10
  24. 65
  25. 564
  26. 25
  27. 2392
  28. 2754
  29. 6690
  30. 1485
  31. 10
  32. 3344
  33. 30
  34. 25
  35. 30
  36. 52
  37. 1204
  38. 2820
  39. 1900
  40. 15

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