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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 278 · 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 town has 1180 people. Its population grows by 25%. How many people live there now?
  2. 2.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  3. 3.A shop sells 4040 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  4. 4.The price of a school bag changes from ₹3180 to ₹1908. By what percent did it come down?
  5. 5.The price of a school bag changes from ₹600 to ₹420. By what percent did it come down?
  6. 6.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  7. 7.The price of a school bag changes from ₹2140 to ₹2675. By what percent did it go up?
  8. 8.A shop sells 2640 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  9. 9.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹3400 to ₹3060. By what percent did it come down?
  11. 11.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  12. 12.A shop sells 1240 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  13. 13.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  14. 14.A water tank holds 480 litres. 30% of the water is used. How many litres are left?
  15. 15.A town has 1380 people. Its population grows by 5%. How many people live there now?
  16. 16.A water tank holds 720 litres. 15% of the water is used. How many litres are left?
  17. 17.A water tank holds 2460 litres. 40% of the water is used. How many litres are left?
  18. 18.A town has 3160 people. Its population grows by 15%. How many people live there now?
  19. 19.The price of a bicycle is ₹1080. It goes up by 50%. What is the new price (in ₹)?
  20. 20.A water tank holds 1980 litres. 20% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹3640 to ₹3094. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹1300 to ₹1365. By what percent did it go up?
  23. 23.A shop sells 640 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  24. 24.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹800 to ₹1200. By what percent did it go up?
  26. 26.A water tank holds 2220 litres. 10% of the water is used. How many litres are left?
  27. 27.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  28. 28.The price of a bicycle is ₹3380. It goes up by 5%. What is the new price (in ₹)?
  29. 29.The price of a bicycle is ₹300. It goes up by 30%. What is the new price (in ₹)?
  30. 30.A water tank holds 3460 litres. 50% of the water is used. How many litres are left?
  31. 31.A water tank holds 4720 litres. 50% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹460 to ₹414. By what percent did it come down?
  33. 33.A water tank holds 4940 litres. 20% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹600 to ₹570. By what percent did it come down?
  35. 35.A shop sells 280 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  36. 36.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  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 ₹4020 to ₹2010. By what percent did it come down?
  39. 39.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  40. 40.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =

Answer key

  1. 1475
  2. 5
  3. 4848
  4. 40
  5. 30
  6. 14.5
  7. 25
  8. 3036
  9. 52
  10. 10
  11. 62.5
  12. 1736
  13. 19
  14. 336
  15. 1449
  16. 612
  17. 1476
  18. 3634
  19. 1620
  20. 1584
  21. 15
  22. 5
  23. 800
  24. 26
  25. 50
  26. 1998
  27. 95
  28. 3549
  29. 390
  30. 1730
  31. 2360
  32. 10
  33. 3952
  34. 5
  35. 350
  36. 51
  37. 1615
  38. 50
  39. 69
  40. 75

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