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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 137 · 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 water tank holds 3620 litres. 40% of the water is used. How many litres are left?
  2. 2.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹3340 to ₹3173. By what percent did it come down?
  4. 4.A town has 1360 people. Its population grows by 5%. How many people live there now?
  5. 5.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  6. 6.The price of a bicycle is ₹3980. It goes up by 5%. What is the new price (in ₹)?
  7. 7.A town has 4960 people. Its population grows by 50%. How many people live there now?
  8. 8.A water tank holds 800 litres. 40% of the water is used. How many litres are left?
  9. 9.A water tank holds 280 litres. 25% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹4040. It goes up by 20%. What is the new price (in ₹)?
  11. 11.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  12. 12.A shop sells 1320 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  13. 13.The price of a bicycle is ₹2020. It goes up by 40%. What is the new price (in ₹)?
  14. 14.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  15. 15.A shop sells 1440 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  16. 16.A water tank holds 3580 litres. 20% of the water is used. How many litres are left?
  17. 17.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  18. 18.The price of a school bag changes from ₹2100 to ₹1260. By what percent did it come down?
  19. 19.A town has 3240 people. Its population grows by 5%. How many people live there now?
  20. 20.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  21. 21.The price of a school bag changes from ₹220 to ₹242. By what percent did it go up?
  22. 22.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  23. 23.The price of a school bag changes from ₹2040 to ₹1938. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹3160 to ₹3792. By what percent did it go up?
  25. 25.A shop sells 4880 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  26. 26.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  27. 27.A water tank holds 4040 litres. 15% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹680 to ₹578. By what percent did it come down?
  29. 29.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  30. 30.A town has 2220 people. Its population grows by 20%. How many people live there now?
  31. 31.The price of a school bag changes from ₹280 to ₹238. By what percent did it come down?
  32. 32.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  33. 33.A water tank holds 140 litres. 50% of the water is used. How many litres are left?
  34. 34.A shop sells 4000 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  35. 35.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  36. 36.A water tank holds 1520 litres. 10% of the water is used. How many litres are left?
  37. 37.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  38. 38.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 160 litres. 10% of the water is used. How many litres are left?
  40. 40.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =

Answer key

  1. 2172
  2. 80
  3. 5
  4. 1428
  5. 28
  6. 4179
  7. 7440
  8. 480
  9. 210
  10. 4848
  11. 57.5
  12. 1650
  13. 2828
  14. 26.5
  15. 1656
  16. 2864
  17. 32
  18. 40
  19. 3402
  20. 49
  21. 10
  22. 14.5
  23. 5
  24. 20
  25. 6100
  26. 56
  27. 3434
  28. 15
  29. 56
  30. 2664
  31. 15
  32. 19
  33. 70
  34. 4200
  35. 49
  36. 1368
  37. 36.5
  38. 37.5
  39. 144
  40. 57.5

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