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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 842 · 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 price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  2. 2.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 4440 litres. 50% of the water is used. How many litres are left?
  4. 4.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  5. 5.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  6. 6.The price of a bicycle is ₹2300. It goes up by 40%. What is the new price (in ₹)?
  7. 7.A town has 3980 people. Its population grows by 40%. How many people live there now?
  8. 8.The price of a school bag changes from ₹1880 to ₹2068. By what percent did it go up?
  9. 9.A water tank holds 4740 litres. 15% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹1320. It goes up by 50%. What is the new price (in ₹)?
  11. 11.A water tank holds 4140 litres. 5% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹3100 to ₹2790. By what percent did it come down?
  13. 13.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  14. 14.A town has 1640 people. Its population grows by 30%. How many people live there now?
  15. 15.A town has 3340 people. Its population grows by 15%. How many people live there now?
  16. 16.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  17. 17.A shop sells 640 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹340 to ₹510. By what percent did it go up?
  19. 19.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  20. 20.A shop sells 2220 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  21. 21.The price of a school bag changes from ₹2560 to ₹2944. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹4840 to ₹3388. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹360 to ₹432. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹4000 to ₹4600. By what percent did it go up?
  25. 25.The price of a bicycle is ₹780. It goes up by 10%. What is the new price (in ₹)?
  26. 26.The price of a bicycle is ₹2660. It goes up by 10%. What is the new price (in ₹)?
  27. 27.A water tank holds 4700 litres. 15% of the water is used. How many litres are left?
  28. 28.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  29. 29.A shop sells 1540 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹2220 to ₹1332. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹2380 to ₹2023. By what percent did it come down?
  32. 32.A water tank holds 440 litres. 30% of the water is used. How many litres are left?
  33. 33.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹1840 to ₹1380. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹4160 to ₹3744. By what percent did it come down?
  36. 36.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  37. 37.A water tank holds 3900 litres. 20% of the water is used. How many litres are left?
  38. 38.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  39. 39.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  40. 40.A shop sells 1520 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?

Answer key

  1. 43
  2. 80
  3. 2220
  4. 27.75
  5. 68
  6. 3220
  7. 5572
  8. 10
  9. 4029
  10. 1980
  11. 3933
  12. 10
  13. 56
  14. 2132
  15. 3841
  16. 65
  17. 800
  18. 50
  19. 40.5
  20. 3108
  21. 15
  22. 30
  23. 20
  24. 15
  25. 858
  26. 2926
  27. 3995
  28. 70
  29. 1925
  30. 40
  31. 15
  32. 308
  33. 72.5
  34. 25
  35. 10
  36. 15.5
  37. 3120
  38. 55
  39. 57.5
  40. 1672

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