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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 347 · 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 800 people. Its population grows by 5%. How many people live there now?
  2. 2.The price of a school bag changes from ₹680 to ₹884. By what percent did it go up?
  3. 3.The price of a bicycle is ₹1240. It goes up by 30%. What is the new price (in ₹)?
  4. 4.A shop sells 1620 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  5. 5.A shop sells 4580 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  6. 6.The price of a school bag changes from ₹3300 to ₹3795. By what percent did it go up?
  7. 7.The price of a bicycle is ₹1540. It goes up by 20%. What is the new price (in ₹)?
  8. 8.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  9. 9.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  10. 10.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 3620 litres. 15% of the water is used. How many litres are left?
  12. 12.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  13. 13.A town has 3800 people. Its population grows by 40%. How many people live there now?
  14. 14.The price of a school bag changes from ₹1320 to ₹1980. By what percent did it go up?
  15. 15.A water tank holds 2860 litres. 25% of the water is used. How many litres are left?
  16. 16.A shop sells 1300 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  17. 17.A town has 2820 people. Its population grows by 40%. How many people live there now?
  18. 18.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  19. 19.A town has 1100 people. Its population grows by 25%. How many people live there now?
  20. 20.A water tank holds 2000 litres. 10% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹2740 to ₹2877. By what percent did it go up?
  22. 22.A water tank holds 4340 litres. 30% of the water is used. How many litres are left?
  23. 23.A water tank holds 3200 litres. 50% of the water is used. How many litres are left?
  24. 24.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹4040 to ₹5252. By what percent did it go up?
  26. 26.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹3420 to ₹3249. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹2000 to ₹1800. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹1380 to ₹1173. By what percent did it come down?
  30. 30.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  31. 31.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  32. 32.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  33. 33.A water tank holds 1700 litres. 5% of the water is used. How many litres are left?
  34. 34.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  35. 35.A water tank holds 160 litres. 40% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹3220 to ₹2898. By what percent did it come down?
  37. 37.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  38. 38.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  39. 39.The price of a bicycle is ₹1520. It goes up by 15%. What is the new price (in ₹)?
  40. 40.The price of a bicycle is ₹260. It goes up by 30%. What is the new price (in ₹)?

Answer key

  1. 840
  2. 30
  3. 1612
  4. 1701
  5. 5267
  6. 15
  7. 1848
  8. 65
  9. 43
  10. 31.25
  11. 3077
  12. 26.5
  13. 5320
  14. 50
  15. 2145
  16. 1430
  17. 3948
  18. 37
  19. 1375
  20. 1800
  21. 5
  22. 3038
  23. 1600
  24. 46
  25. 30
  26. 12.5
  27. 5
  28. 10
  29. 15
  30. 32
  31. 37.5
  32. 18.75
  33. 1615
  34. 62.5
  35. 96
  36. 10
  37. 43.75
  38. 96
  39. 1748
  40. 338

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