← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 382 · 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 2840 litres. 5% of the water is used. How many litres are left?
  2. 2.A water tank holds 1120 litres. 50% of the water is used. How many litres are left?
  3. 3.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  4. 4.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  5. 5.A town has 3620 people. Its population grows by 30%. How many people live there now?
  6. 6.A town has 3960 people. Its population grows by 10%. How many people live there now?
  7. 7.The price of a school bag changes from ₹2280 to ₹1596. By what percent did it come down?
  8. 8.A shop sells 820 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  9. 9.A water tank holds 2520 litres. 40% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹560 to ₹448. By what percent did it come down?
  11. 11.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  12. 12.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  13. 13.A water tank holds 460 litres. 20% of the water is used. How many litres are left?
  14. 14.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹2600 to ₹1300. By what percent did it come down?
  16. 16.A water tank holds 4940 litres. 5% of the water is used. How many litres are left?
  17. 17.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  18. 18.A water tank holds 500 litres. 30% of the water is used. How many litres are left?
  19. 19.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  20. 20.A town has 3000 people. Its population grows by 15%. How many people live there now?
  21. 21.The price of a school bag changes from ₹4980 to ₹3486. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹3300 to ₹2475. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹2680 to ₹1876. By what percent did it come down?
  24. 24.The price of a bicycle is ₹3640. It goes up by 5%. What is the new price (in ₹)?
  25. 25.A town has 2480 people. Its population grows by 15%. How many people live there now?
  26. 26.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  27. 27.A shop sells 2580 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  28. 28.The price of a school bag changes from ₹680 to ₹714. By what percent did it go up?
  29. 29.A water tank holds 3800 litres. 30% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹3460. It goes up by 50%. What is the new price (in ₹)?
  31. 31.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  32. 32.A water tank holds 4280 litres. 40% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹60 to ₹51. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹360 to ₹324. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹4800 to ₹4320. By what percent did it come down?
  36. 36.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  37. 37.The price of a school bag changes from ₹4080 to ₹5304. By what percent did it go up?
  38. 38.A water tank holds 4940 litres. 40% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹3320 to ₹2656. By what percent did it come down?
  40. 40.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =

Answer key

  1. 2698
  2. 560
  3. 28.75
  4. 6.25
  5. 4706
  6. 4356
  7. 30
  8. 1025
  9. 1512
  10. 20
  11. 33.5
  12. 33
  13. 368
  14. 5
  15. 50
  16. 4693
  17. 61
  18. 350
  19. 20.75
  20. 3450
  21. 30
  22. 25
  23. 30
  24. 3822
  25. 2852
  26. 96
  27. 3870
  28. 5
  29. 2660
  30. 5190
  31. 40
  32. 2568
  33. 15
  34. 10
  35. 10
  36. 9.75
  37. 30
  38. 2964
  39. 20
  40. 46

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude