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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 916 · 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 4840 litres. 5% of the water is used. How many litres are left?
  2. 2.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  3. 3.A water tank holds 2860 litres. 20% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹920 to ₹1104. By what percent did it go up?
  5. 5.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  6. 6.A water tank holds 3120 litres. 30% of the water is used. How many litres are left?
  7. 7.A shop sells 400 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  8. 8.The price of a school bag changes from ₹4100 to ₹2050. By what percent did it come down?
  9. 9.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 1680 litres. 15% of the water is used. How many litres are left?
  11. 11.A water tank holds 4800 litres. 10% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹1560 to ₹1482. By what percent did it come down?
  13. 13.A water tank holds 660 litres. 5% of the water is used. How many litres are left?
  14. 14.A water tank holds 3320 litres. 25% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹3640 to ₹4186. By what percent did it go up?
  16. 16.A shop sells 3160 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  17. 17.A water tank holds 1020 litres. 10% of the water is used. How many litres are left?
  18. 18.A town has 4440 people. Its population grows by 30%. How many people live there now?
  19. 19.A water tank holds 2640 litres. 40% of the water is used. How many litres are left?
  20. 20.A town has 240 people. Its population grows by 25%. How many people live there now?
  21. 21.A shop sells 1080 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  22. 22.The price of a bicycle is ₹900. It goes up by 5%. What is the new price (in ₹)?
  23. 23.A water tank holds 2020 litres. 15% of the water is used. How many litres are left?
  24. 24.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  25. 25.A town has 1360 people. Its population grows by 50%. How many people live there now?
  26. 26.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  27. 27.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  28. 28.A shop sells 4560 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  29. 29.The price of a bicycle is ₹2920. It goes up by 15%. What is the new price (in ₹)?
  30. 30.The price of a bicycle is ₹2740. It goes up by 5%. What is the new price (in ₹)?
  31. 31.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.A water tank holds 320 litres. 10% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹400 to ₹240. By what percent did it come down?
  34. 34.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  35. 35.A water tank holds 1220 litres. 25% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹460. It goes up by 40%. What is the new price (in ₹)?
  37. 37.The price of a bicycle is ₹4020. It goes up by 5%. What is the new price (in ₹)?
  38. 38.A water tank holds 1300 litres. 10% of the water is used. How many litres are left?
  39. 39.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹1480 to ₹1110. By what percent did it come down?

Answer key

  1. 4598
  2. 52
  3. 2288
  4. 20
  5. 61
  6. 2184
  7. 460
  8. 50
  9. 65
  10. 1428
  11. 4320
  12. 5
  13. 627
  14. 2490
  15. 15
  16. 3634
  17. 918
  18. 5772
  19. 1584
  20. 300
  21. 1404
  22. 945
  23. 1717
  24. 58
  25. 2040
  26. 54
  27. 14
  28. 4788
  29. 3358
  30. 2877
  31. 14.5
  32. 288
  33. 40
  34. 46
  35. 915
  36. 644
  37. 4221
  38. 1170
  39. 80
  40. 25

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