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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 801 · 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 shop sells 4440 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  2. 2.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹500 to ₹450. By what percent did it come down?
  4. 4.A town has 720 people. Its population grows by 30%. How many people live there now?
  5. 5.A water tank holds 2300 litres. 5% of the water is used. How many litres are left?
  6. 6.A water tank holds 860 litres. 15% of the water is used. How many litres are left?
  7. 7.A water tank holds 2860 litres. 50% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹2560 to ₹3328. By what percent did it go up?
  9. 9.A water tank holds 1120 litres. 25% of the water is used. How many litres are left?
  10. 10.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  11. 11.The price of a bicycle is ₹3740. It goes up by 20%. What is the new price (in ₹)?
  12. 12.The price of a school bag changes from ₹960 to ₹1008. By what percent did it go up?
  13. 13.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  14. 14.A town has 300 people. Its population grows by 15%. How many people live there now?
  15. 15.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  16. 16.A price comes down by 30% 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 ₹1640 to ₹2296. By what percent did it go up?
  18. 18.A shop sells 4320 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  19. 19.A water tank holds 920 litres. 15% of the water is used. How many litres are left?
  20. 20.A water tank holds 780 litres. 50% of the water is used. How many litres are left?
  21. 21.A water tank holds 3060 litres. 50% of the water is used. How many litres are left?
  22. 22.A town has 3480 people. Its population grows by 40%. How many people live there now?
  23. 23.The price of a school bag changes from ₹2120 to ₹2968. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹3580 to ₹3759. By what percent did it go up?
  25. 25.The price of a bicycle is ₹4920. It goes up by 5%. What is the new price (in ₹)?
  26. 26.A shop sells 4060 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  27. 27.The price of a bicycle is ₹380. It goes up by 25%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹240 to ₹180. By what percent did it come down?
  29. 29.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹1780 to ₹2492. By what percent did it go up?
  31. 31.The price of a school bag changes from ₹1000 to ₹950. By what percent did it come down?
  32. 32.A shop sells 3360 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  33. 33.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  34. 34.The price of a school bag changes from ₹3760 to ₹4136. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹800 to ₹680. By what percent did it come down?
  36. 36.A shop sells 1920 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  37. 37.The price of a school bag changes from ₹1760 to ₹1056. By what percent did it come down?
  38. 38.A shop sells 160 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  39. 39.A town has 1000 people. Its population grows by 20%. How many people live there now?
  40. 40.The price of a school bag changes from ₹2600 to ₹3120. By what percent did it go up?

Answer key

  1. 6660
  2. 125
  3. 10
  4. 936
  5. 2185
  6. 731
  7. 1430
  8. 30
  9. 840
  10. 80
  11. 4488
  12. 5
  13. 58
  14. 345
  15. 36.5
  16. 51
  17. 40
  18. 6048
  19. 782
  20. 390
  21. 1530
  22. 4872
  23. 40
  24. 5
  25. 5166
  26. 4669
  27. 475
  28. 25
  29. 49.5
  30. 40
  31. 5
  32. 3696
  33. 36.25
  34. 10
  35. 15
  36. 2880
  37. 40
  38. 176
  39. 1200
  40. 20

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