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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 424 · 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 price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  2. 2.The price of a school bag changes from ₹2000 to ₹2300. By what percent did it go up?
  3. 3.A town has 2320 people. Its population grows by 50%. How many people live there now?
  4. 4.The price of a bicycle is ₹4440. It goes up by 10%. What is the new price (in ₹)?
  5. 5.The price of a bicycle is ₹1340. It goes up by 25%. What is the new price (in ₹)?
  6. 6.The price of a school bag changes from ₹860 to ₹817. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹2860 to ₹2145. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹2520 to ₹2142. By what percent did it come down?
  9. 9.The price of a bicycle is ₹1000. It goes up by 15%. What is the new price (in ₹)?
  10. 10.The price of a school bag changes from ₹720 to ₹756. By what percent did it go up?
  11. 11.The price of a bicycle is ₹1660. It goes up by 15%. What is the new price (in ₹)?
  12. 12.The price of a bicycle is ₹1100. It goes up by 50%. What is the new price (in ₹)?
  13. 13.A shop sells 4340 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  14. 14.A water tank holds 3700 litres. 25% of the water is used. How many litres are left?
  15. 15.A water tank holds 2000 litres. 5% of the water is used. How many litres are left?
  16. 16.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹800 to ₹1040. By what percent did it go up?
  18. 18.A water tank holds 580 litres. 40% of the water is used. How many litres are left?
  19. 19.A water tank holds 3960 litres. 25% of the water is used. How many litres are left?
  20. 20.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 580 litres. 50% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹2440 to ₹1220. By what percent did it come down?
  23. 23.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  24. 24.The price of a school bag changes from ₹4500 to ₹4950. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹4540 to ₹3405. By what percent did it come down?
  26. 26.A shop sells 2640 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  27. 27.A shop sells 2760 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  28. 28.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  29. 29.The price of a school bag changes from ₹1400 to ₹1190. By what percent did it come down?
  30. 30.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  31. 31.A water tank holds 3540 litres. 10% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹4160 to ₹4992. By what percent did it go up?
  33. 33.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  34. 34.A shop sells 3960 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  35. 35.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 1740 litres. 25% of the water is used. How many litres are left?
  37. 37.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  38. 38.A town has 1580 people. Its population grows by 10%. How many people live there now?
  39. 39.The price of a school bag changes from ₹700 to ₹875. By what percent did it go up?
  40. 40.The price of a school bag changes from ₹880 to ₹440. By what percent did it come down?

Answer key

  1. 19
  2. 15
  3. 3480
  4. 4884
  5. 1675
  6. 5
  7. 25
  8. 15
  9. 1150
  10. 5
  11. 1909
  12. 1650
  13. 4557
  14. 2775
  15. 1900
  16. 37
  17. 30
  18. 348
  19. 2970
  20. 26
  21. 290
  22. 50
  23. 26
  24. 10
  25. 25
  26. 3168
  27. 3588
  28. 64
  29. 15
  30. 19.25
  31. 3186
  32. 20
  33. 28
  34. 4158
  35. 125
  36. 1305
  37. 33.5
  38. 1738
  39. 25
  40. 50

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