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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 609 · 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 3900 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹2460 to ₹3690. By what percent did it go up?
  3. 3.A town has 3240 people. Its population grows by 10%. How many people live there now?
  4. 4.A town has 4500 people. Its population grows by 50%. How many people live there now?
  5. 5.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  6. 6.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  7. 7.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.A shop sells 2340 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  9. 9.The price of a bicycle is ₹4140. It goes up by 20%. What is the new price (in ₹)?
  10. 10.The price of a bicycle is ₹260. It goes up by 5%. What is the new price (in ₹)?
  11. 11.A shop sells 380 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  12. 12.The price of a bicycle is ₹3400. It goes up by 5%. What is the new price (in ₹)?
  13. 13.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  14. 14.The price of a bicycle is ₹1800. It goes up by 5%. What is the new price (in ₹)?
  15. 15.The price of a bicycle is ₹1060. It goes up by 10%. What is the new price (in ₹)?
  16. 16.The price of a school bag changes from ₹760 to ₹1140. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹2900 to ₹1740. By what percent did it come down?
  18. 18.A shop sells 2220 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹1260 to ₹1764. By what percent did it go up?
  20. 20.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹3920 to ₹4508. By what percent did it go up?
  22. 22.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  23. 23.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  24. 24.The price of a school bag changes from ₹3360 to ₹4368. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹2220 to ₹2331. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹2680 to ₹2010. By what percent did it come down?
  27. 27.A water tank holds 4600 litres. 10% of the water is used. How many litres are left?
  28. 28.A water tank holds 1500 litres. 10% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹3580. It goes up by 40%. What is the new price (in ₹)?
  30. 30.A water tank holds 100 litres. 15% of the water is used. How many litres are left?
  31. 31.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  32. 32.The price of a school bag changes from ₹1440 to ₹864. By what percent did it come down?
  33. 33.The price of a bicycle is ₹1180. It goes up by 50%. What is the new price (in ₹)?
  34. 34.A water tank holds 2480 litres. 5% of the water is used. How many litres are left?
  35. 35.A water tank holds 3680 litres. 40% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹660. It goes up by 15%. What is the new price (in ₹)?
  37. 37.The price of a bicycle is ₹4360. It goes up by 20%. What is the new price (in ₹)?
  38. 38.The price of a school bag changes from ₹2160 to ₹1620. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹160 to ₹224. By what percent did it go up?
  40. 40.A shop sells 4280 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?

Answer key

  1. 3705
  2. 50
  3. 3564
  4. 6750
  5. 26
  6. 61
  7. 43
  8. 2574
  9. 4968
  10. 273
  11. 494
  12. 3570
  13. 36.5
  14. 1890
  15. 1166
  16. 50
  17. 40
  18. 2331
  19. 40
  20. 75
  21. 15
  22. 33
  23. 60
  24. 30
  25. 5
  26. 25
  27. 4140
  28. 1350
  29. 5012
  30. 85
  31. 60
  32. 40
  33. 1770
  34. 2356
  35. 2208
  36. 759
  37. 5232
  38. 25
  39. 40
  40. 5564

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