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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 559 · 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 25% and then comes down by 15% more. By what percent has it come down in all? =
  2. 2.A town has 1440 people. Its population grows by 20%. How many people live there now?
  3. 3.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  4. 4.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  5. 5.A water tank holds 3840 litres. 10% of the water is used. How many litres are left?
  6. 6.The price of a bicycle is ₹3560. It goes up by 25%. What is the new price (in ₹)?
  7. 7.A water tank holds 920 litres. 40% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹2420 to ₹1815. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹3080 to ₹1540. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹3160 to ₹3950. By what percent did it go up?
  11. 11.The price of a bicycle is ₹2680. It goes up by 15%. What is the new price (in ₹)?
  12. 12.A water tank holds 1440 litres. 20% of the water is used. How many litres are left?
  13. 13.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  14. 14.A town has 4720 people. Its population grows by 50%. How many people live there now?
  15. 15.A shop sells 760 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  16. 16.The price of a bicycle is ₹4040. It goes up by 10%. What is the new price (in ₹)?
  17. 17.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  18. 18.The price of a school bag changes from ₹80 to ₹72. By what percent did it come down?
  19. 19.The price of a bicycle is ₹2140. It goes up by 20%. What is the new price (in ₹)?
  20. 20.A water tank holds 4760 litres. 5% of the water is used. How many litres are left?
  21. 21.A shop sells 1960 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  22. 22.A water tank holds 2160 litres. 30% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹260 to ₹312. By what percent did it go up?
  24. 24.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  25. 25.The price of a bicycle is ₹3980. It goes up by 30%. What is the new price (in ₹)?
  26. 26.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹1920 to ₹1344. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹140 to ₹154. By what percent did it go up?
  29. 29.A water tank holds 2640 litres. 15% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹1440 to ₹1368. By what percent did it come down?
  31. 31.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.A water tank holds 860 litres. 15% of the water is used. How many litres are left?
  33. 33.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  34. 34.A shop sells 1240 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  35. 35.A town has 780 people. Its population grows by 40%. How many people live there now?
  36. 36.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  37. 37.A water tank holds 4680 litres. 10% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹3580 to ₹3222. By what percent did it come down?
  39. 39.A town has 2860 people. Its population grows by 20%. How many people live there now?
  40. 40.The price of a bicycle is ₹1240. It goes up by 20%. What is the new price (in ₹)?

Answer key

  1. 36.25
  2. 1728
  3. 28
  4. 21
  5. 3456
  6. 4450
  7. 552
  8. 25
  9. 50
  10. 25
  11. 3082
  12. 1152
  13. 62.5
  14. 7080
  15. 912
  16. 4444
  17. 58
  18. 10
  19. 2568
  20. 4522
  21. 2450
  22. 1512
  23. 20
  24. 56
  25. 5174
  26. 17
  27. 30
  28. 10
  29. 2244
  30. 5
  31. 43
  32. 731
  33. 54
  34. 1860
  35. 1092
  36. 36.25
  37. 4212
  38. 10
  39. 3432
  40. 1488

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