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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 640 · 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 2520 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹3000 to ₹2100. By what percent did it come down?
  3. 3.The price of a school bag changes from ₹900 to ₹990. By what percent did it go up?
  4. 4.The price of a bicycle is ₹1100. It goes up by 50%. What is the new price (in ₹)?
  5. 5.A town has 4200 people. Its population grows by 20%. How many people live there now?
  6. 6.A water tank holds 2020 litres. 20% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹1900 to ₹1805. By what percent did it come down?
  8. 8.A shop sells 2540 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  9. 9.A water tank holds 4260 litres. 30% of the water is used. How many litres are left?
  10. 10.A shop sells 4700 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  11. 11.A water tank holds 780 litres. 20% of the water is used. How many litres are left?
  12. 12.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  13. 13.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  14. 14.A water tank holds 4220 litres. 20% of the water is used. How many litres are left?
  15. 15.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  16. 16.The price of a school bag changes from ₹1240 to ₹1426. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹340 to ₹374. By what percent did it go up?
  18. 18.The price of a bicycle is ₹4780. It goes up by 40%. What is the new price (in ₹)?
  19. 19.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  20. 20.A water tank holds 2740 litres. 15% of the water is used. How many litres are left?
  21. 21.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.The price of a bicycle is ₹3040. It goes up by 40%. What is the new price (in ₹)?
  23. 23.The price of a school bag changes from ₹200 to ₹280. By what percent did it go up?
  24. 24.A water tank holds 560 litres. 20% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹1280 to ₹1664. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹4860 to ₹4374. By what percent did it come down?
  27. 27.The price of a school bag changes from ₹2980 to ₹2235. By what percent did it come down?
  28. 28.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 740 litres. 15% of the water is used. How many litres are left?
  30. 30.A shop sells 4360 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  31. 31.A water tank holds 260 litres. 10% of the water is used. How many litres are left?
  32. 32.A water tank holds 520 litres. 40% of the water is used. How many litres are left?
  33. 33.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  34. 34.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  35. 35.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  36. 36.The price of a school bag changes from ₹2620 to ₹3144. By what percent did it go up?
  37. 37.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  38. 38.The price of a school bag changes from ₹2700 to ₹2160. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹840 to ₹1050. By what percent did it go up?
  40. 40.A town has 2640 people. Its population grows by 5%. How many people live there now?

Answer key

  1. 2394
  2. 30
  3. 10
  4. 1650
  5. 5040
  6. 1616
  7. 5
  8. 2794
  9. 2982
  10. 7050
  11. 624
  12. 82
  13. 47
  14. 3376
  15. 36
  16. 15
  17. 10
  18. 6692
  19. 40
  20. 2329
  21. 44
  22. 4256
  23. 40
  24. 448
  25. 30
  26. 10
  27. 25
  28. 43
  29. 629
  30. 6104
  31. 234
  32. 312
  33. 36.25
  34. 43.75
  35. 49.5
  36. 20
  37. 23.5
  38. 20
  39. 25
  40. 2772

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