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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 179 · 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 920 litres. 30% of the water is used. How many litres are left?
  2. 2.A water tank holds 5000 litres. 15% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹2100 to ₹1470. By what percent did it come down?
  4. 4.The price of a school bag changes from ₹2500 to ₹3500. By what percent did it go up?
  5. 5.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹2720 to ₹2856. By what percent did it go up?
  7. 7.A water tank holds 3340 litres. 50% of the water is used. How many litres are left?
  8. 8.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  9. 9.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  10. 10.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  11. 11.A water tank holds 3640 litres. 40% of the water is used. How many litres are left?
  12. 12.A water tank holds 3860 litres. 25% of the water is used. How many litres are left?
  13. 13.A shop sells 440 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  14. 14.The price of a school bag changes from ₹540 to ₹486. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹3140 to ₹2826. By what percent did it come down?
  16. 16.The price of a bicycle is ₹400. It goes up by 20%. What is the new price (in ₹)?
  17. 17.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  18. 18.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  19. 19.A water tank holds 1700 litres. 30% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹620 to ₹806. By what percent did it go up?
  21. 21.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  22. 22.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  23. 23.A shop sells 860 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  24. 24.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  25. 25.A shop sells 1540 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  26. 26.The price of a school bag changes from ₹3460 to ₹3806. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹3280 to ₹4592. By what percent did it go up?
  28. 28.A water tank holds 940 litres. 10% of the water is used. How many litres are left?
  29. 29.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  30. 30.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  31. 31.A water tank holds 4080 litres. 50% of the water is used. How many litres are left?
  32. 32.A water tank holds 2860 litres. 20% of the water is used. How many litres are left?
  33. 33.A water tank holds 1120 litres. 50% of the water is used. How many litres are left?
  34. 34.A water tank holds 1000 litres. 50% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹1360. It goes up by 30%. What is the new price (in ₹)?
  36. 36.The price of a bicycle is ₹420. It goes up by 25%. What is the new price (in ₹)?
  37. 37.A water tank holds 4080 litres. 15% of the water is used. How many litres are left?
  38. 38.The price of a bicycle is ₹4860. It goes up by 15%. What is the new price (in ₹)?
  39. 39.A water tank holds 940 litres. 15% of the water is used. How many litres are left?
  40. 40.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =

Answer key

  1. 644
  2. 4250
  3. 30
  4. 40
  5. 24
  6. 5
  7. 1670
  8. 46
  9. 80
  10. 14
  11. 2184
  12. 2895
  13. 528
  14. 10
  15. 10
  16. 480
  17. 28.75
  18. 75
  19. 1190
  20. 30
  21. 3.5
  22. 31.25
  23. 989
  24. 50
  25. 2310
  26. 10
  27. 40
  28. 846
  29. 55
  30. 75
  31. 2040
  32. 2288
  33. 560
  34. 500
  35. 1768
  36. 525
  37. 3468
  38. 5589
  39. 799
  40. 36.5

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