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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 226 · 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 2920 litres. 25% of the water is used. How many litres are left?
  2. 2.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  3. 3.The price of a school bag changes from ₹2320 to ₹2668. By what percent did it go up?
  4. 4.A shop sells 3700 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  5. 5.The price of a bicycle is ₹3000. It goes up by 30%. What is the new price (in ₹)?
  6. 6.A water tank holds 2360 litres. 5% of the water is used. How many litres are left?
  7. 7.A town has 640 people. Its population grows by 20%. How many people live there now?
  8. 8.A water tank holds 1360 litres. 25% of the water is used. How many litres are left?
  9. 9.The price of a bicycle is ₹3660. It goes up by 40%. What is the new price (in ₹)?
  10. 10.A water tank holds 860 litres. 25% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹360 to ₹396. By what percent did it go up?
  12. 12.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  13. 13.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  14. 14.The price of a school bag changes from ₹1380 to ₹828. By what percent did it come down?
  15. 15.A water tank holds 1060 litres. 30% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹3160. It goes up by 20%. What is the new price (in ₹)?
  17. 17.A water tank holds 3140 litres. 40% of the water is used. How many litres are left?
  18. 18.A water tank holds 880 litres. 40% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹360 to ₹216. By what percent did it come down?
  20. 20.The price of a bicycle is ₹400. It goes up by 40%. What is the new price (in ₹)?
  21. 21.The price of a school bag changes from ₹4700 to ₹7050. By what percent did it go up?
  22. 22.A shop sells 2720 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  23. 23.The price of a school bag changes from ₹4020 to ₹3015. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹200 to ₹250. By what percent did it go up?
  25. 25.A water tank holds 4440 litres. 30% of the water is used. How many litres are left?
  26. 26.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  27. 27.A water tank holds 760 litres. 40% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹660. It goes up by 5%. What is the new price (in ₹)?
  29. 29.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  30. 30.A shop sells 1140 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  31. 31.The price of a bicycle is ₹1860. It goes up by 15%. What is the new price (in ₹)?
  32. 32.A water tank holds 4160 litres. 20% of the water is used. How many litres are left?
  33. 33.A water tank holds 3640 litres. 25% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹1420 to ₹1207. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹540 to ₹513. By what percent did it come down?
  36. 36.A shop sells 580 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  37. 37.A town has 1080 people. Its population grows by 40%. How many people live there now?
  38. 38.A town has 1840 people. Its population grows by 40%. How many people live there now?
  39. 39.The price of a school bag changes from ₹4140 to ₹5796. By what percent did it go up?
  40. 40.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =

Answer key

  1. 2190
  2. 64
  3. 15
  4. 4255
  5. 3900
  6. 2242
  7. 768
  8. 1020
  9. 5124
  10. 645
  11. 10
  12. 26.5
  13. 27.75
  14. 40
  15. 742
  16. 3792
  17. 1884
  18. 528
  19. 40
  20. 560
  21. 50
  22. 3128
  23. 25
  24. 25
  25. 3108
  26. 55
  27. 456
  28. 693
  29. 95
  30. 1710
  31. 2139
  32. 3328
  33. 2730
  34. 15
  35. 5
  36. 638
  37. 1512
  38. 2576
  39. 40
  40. 9.75

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