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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 765 · 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.The price of a school bag changes from ₹2440 to ₹3416. By what percent did it go up?
  2. 2.The price of a school bag changes from ₹220 to ₹231. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹260 to ₹312. By what percent did it go up?
  4. 4.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  5. 5.A water tank holds 1420 litres. 50% of the water is used. How many litres are left?
  6. 6.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.The price of a bicycle is ₹1040. It goes up by 5%. What is the new price (in ₹)?
  8. 8.A water tank holds 1960 litres. 10% of the water is used. How many litres are left?
  9. 9.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 4200 litres. 30% of the water is used. How many litres are left?
  11. 11.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  12. 12.The price of a bicycle is ₹4600. It goes up by 25%. What is the new price (in ₹)?
  13. 13.A town has 2340 people. Its population grows by 10%. How many people live there now?
  14. 14.The price of a school bag changes from ₹4060 to ₹6090. By what percent did it go up?
  15. 15.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  16. 16.A shop sells 3820 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  17. 17.The price of a school bag changes from ₹380 to ₹418. By what percent did it go up?
  18. 18.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  19. 19.A town has 240 people. Its population grows by 50%. How many people live there now?
  20. 20.A shop sells 280 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  21. 21.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  22. 22.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  23. 23.A shop sells 3360 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  24. 24.A town has 580 people. Its population grows by 30%. How many people live there now?
  25. 25.The price of a school bag changes from ₹320 to ₹448. By what percent did it go up?
  26. 26.A town has 1380 people. Its population grows by 15%. How many people live there now?
  27. 27.A water tank holds 3900 litres. 20% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹3400. It goes up by 40%. What is the new price (in ₹)?
  29. 29.A water tank holds 880 litres. 50% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹1280 to ₹1472. By what percent did it go up?
  31. 31.The price of a school bag changes from ₹400 to ₹360. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹200 to ₹220. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹3580 to ₹3938. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹4360 to ₹5232. By what percent did it go up?
  35. 35.A water tank holds 1780 litres. 40% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹2380. It goes up by 5%. What is the new price (in ₹)?
  37. 37.A water tank holds 1900 litres. 15% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹180 to ₹162. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹2620 to ₹2882. By what percent did it go up?
  40. 40.A water tank holds 4180 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 40
  2. 5
  3. 20
  4. 8
  5. 710
  6. 21
  7. 1092
  8. 1764
  9. 32.25
  10. 2940
  11. 32
  12. 5750
  13. 2574
  14. 50
  15. 20.75
  16. 4775
  17. 10
  18. 27.5
  19. 360
  20. 392
  21. 96
  22. 72.5
  23. 4368
  24. 754
  25. 40
  26. 1587
  27. 3120
  28. 4760
  29. 440
  30. 15
  31. 10
  32. 10
  33. 10
  34. 20
  35. 1068
  36. 2499
  37. 1615
  38. 10
  39. 10
  40. 2090

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