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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 271 · 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.

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  1. 1.A shop sells 2800 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  2. 2.A town has 2080 people. Its population grows by 30%. How many people live there now?
  3. 3.The price of a school bag changes from ₹4040 to ₹4242. By what percent did it go up?
  4. 4.The price of a bicycle is ₹820. It goes up by 5%. What is the new price (in ₹)?
  5. 5.A price comes down by 40% 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 ₹4380 to ₹4161. By what percent did it come down?
  7. 7.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  8. 8.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹2260 to ₹1921. By what percent did it come down?
  10. 10.A town has 3860 people. Its population grows by 30%. How many people live there now?
  11. 11.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  12. 12.A shop sells 2160 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  13. 13.A town has 4060 people. Its population grows by 15%. How many people live there now?
  14. 14.The price of a school bag changes from ₹700 to ₹595. By what percent did it come down?
  15. 15.The price of a bicycle is ₹3080. It goes up by 20%. What is the new price (in ₹)?
  16. 16.The price of a bicycle is ₹3680. It goes up by 40%. What is the new price (in ₹)?
  17. 17.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  18. 18.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  19. 19.A town has 1640 people. Its population grows by 5%. How many people live there now?
  20. 20.A water tank holds 4920 litres. 10% of the water is used. How many litres are left?
  21. 21.A water tank holds 2260 litres. 30% of the water is used. How many litres are left?
  22. 22.A town has 2280 people. Its population grows by 50%. How many people live there now?
  23. 23.A shop sells 3180 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  24. 24.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  25. 25.The price of a bicycle is ₹4540. It goes up by 20%. What is the new price (in ₹)?
  26. 26.A water tank holds 2520 litres. 40% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹2540 to ₹3556. By what percent did it go up?
  28. 28.A water tank holds 2280 litres. 20% of the water is used. How many litres are left?
  29. 29.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹620 to ₹775. By what percent did it go up?
  31. 31.A water tank holds 3080 litres. 10% of the water is used. How many litres are left?
  32. 32.A water tank holds 720 litres. 25% of the water is used. How many litres are left?
  33. 33.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  35. 35.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  36. 36.A shop sells 1100 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  37. 37.The price of a school bag changes from ₹380 to ₹228. By what percent did it come down?
  38. 38.The price of a bicycle is ₹460. It goes up by 50%. What is the new price (in ₹)?
  39. 39.A water tank holds 1120 litres. 30% of the water is used. How many litres are left?
  40. 40.A water tank holds 4020 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 4200
  2. 2704
  3. 5
  4. 861
  5. 43
  6. 5
  7. 19.25
  8. 82
  9. 15
  10. 5018
  11. 26.5
  12. 2268
  13. 4669
  14. 15
  15. 3696
  16. 5152
  17. 110
  18. 28
  19. 1722
  20. 4428
  21. 1582
  22. 3420
  23. 3339
  24. 65
  25. 5448
  26. 1512
  27. 40
  28. 1824
  29. 82
  30. 25
  31. 2772
  32. 540
  33. 75
  34. 31.25
  35. 12.5
  36. 1210
  37. 40
  38. 690
  39. 784
  40. 3819

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