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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 358 · 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 4800 people. Its population grows by 20%. How many people live there now?
  2. 2.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹260 to ₹156. By what percent did it come down?
  4. 4.A water tank holds 280 litres. 20% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹4060 to ₹4263. By what percent did it go up?
  6. 6.A shop sells 4020 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  7. 7.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹880 to ₹924. By what percent did it go up?
  9. 9.The price of a bicycle is ₹4980. It goes up by 20%. What is the new price (in ₹)?
  10. 10.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  11. 11.A shop sells 2520 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  12. 12.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 660 litres. 40% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹4320 to ₹4968. By what percent did it go up?
  15. 15.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  16. 16.A water tank holds 340 litres. 15% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹2060 to ₹3090. By what percent did it go up?
  18. 18.A water tank holds 2580 litres. 25% of the water is used. How many litres are left?
  19. 19.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  20. 20.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹4460 to ₹5352. By what percent did it go up?
  22. 22.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  23. 23.The price of a bicycle is ₹4600. It goes up by 25%. What is the new price (in ₹)?
  24. 24.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  25. 25.The price of a bicycle is ₹1640. It goes up by 25%. What is the new price (in ₹)?
  26. 26.A town has 3540 people. Its population grows by 25%. How many people live there now?
  27. 27.A town has 2340 people. Its population grows by 30%. How many people live there now?
  28. 28.A town has 2920 people. Its population grows by 25%. How many people live there now?
  29. 29.The price of a school bag changes from ₹4640 to ₹3944. By what percent did it come down?
  30. 30.A water tank holds 2800 litres. 40% of the water is used. How many litres are left?
  31. 31.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹340 to ₹374. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹840 to ₹1008. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹2880 to ₹3168. By what percent did it go up?
  35. 35.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  36. 36.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  37. 37.A town has 4160 people. Its population grows by 30%. How many people live there now?
  38. 38.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  39. 39.A shop sells 4960 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  40. 40.A town has 2780 people. Its population grows by 30%. How many people live there now?

Answer key

  1. 5760
  2. 75
  3. 40
  4. 224
  5. 5
  6. 5025
  7. 54
  8. 5
  9. 5976
  10. 36.5
  11. 3780
  12. 15.5
  13. 396
  14. 15
  15. 36.25
  16. 289
  17. 50
  18. 1935
  19. 36
  20. 26
  21. 20
  22. 46
  23. 5750
  24. 60
  25. 2050
  26. 4425
  27. 3042
  28. 3650
  29. 15
  30. 1680
  31. 21
  32. 10
  33. 20
  34. 10
  35. 31.25
  36. 65
  37. 5408
  38. 3.5
  39. 7440
  40. 3614

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