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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 84 · 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.

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  1. 1.A water tank holds 2400 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹540. It goes up by 10%. What is the new price (in ₹)?
  3. 3.A town has 960 people. Its population grows by 30%. How many people live there now?
  4. 4.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  5. 5.A water tank holds 1880 litres. 10% of the water is used. How many litres are left?
  6. 6.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  7. 7.A shop sells 2100 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  9. 9.A water tank holds 140 litres. 30% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹3880 to ₹4268. By what percent did it go up?
  11. 11.A water tank holds 880 litres. 10% of the water is used. How many litres are left?
  12. 12.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹240 to ₹300. By what percent did it go up?
  14. 14.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹1840 to ₹1104. By what percent did it come down?
  16. 16.The price of a bicycle is ₹160. It goes up by 10%. What is the new price (in ₹)?
  17. 17.A water tank holds 4640 litres. 10% of the water is used. How many litres are left?
  18. 18.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  19. 19.A shop sells 3360 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  20. 20.The price of a school bag changes from ₹3180 to ₹2862. By what percent did it come down?
  21. 21.The price of a bicycle is ₹4520. It goes up by 20%. What is the new price (in ₹)?
  22. 22.A water tank holds 140 litres. 25% of the water is used. How many litres are left?
  23. 23.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  24. 24.A water tank holds 4300 litres. 10% of the water is used. How many litres are left?
  25. 25.A water tank holds 4180 litres. 50% of the water is used. How many litres are left?
  26. 26.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹1960 to ₹2744. By what percent did it go up?
  28. 28.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹1900 to ₹1425. By what percent did it come down?
  30. 30.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹3400 to ₹2040. By what percent did it come down?
  32. 32.A water tank holds 1400 litres. 10% of the water is used. How many litres are left?
  33. 33.A town has 960 people. Its population grows by 5%. How many people live there now?
  34. 34.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  35. 35.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  36. 36.The price of a bicycle is ₹660. It goes up by 5%. What is the new price (in ₹)?
  37. 37.A town has 3740 people. Its population grows by 25%. How many people live there now?
  38. 38.A water tank holds 4560 litres. 25% of the water is used. How many litres are left?
  39. 39.A shop sells 2800 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  40. 40.A shop sells 3520 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?

Answer key

  1. 2280
  2. 594
  3. 1248
  4. 47.5
  5. 1692
  6. 72.5
  7. 2205
  8. 43
  9. 98
  10. 10
  11. 792
  12. 17
  13. 25
  14. 75
  15. 40
  16. 176
  17. 4176
  18. 57.5
  19. 5040
  20. 10
  21. 5424
  22. 105
  23. 65
  24. 3870
  25. 2090
  26. 18.75
  27. 40
  28. 68
  29. 25
  30. 62.5
  31. 40
  32. 1260
  33. 1008
  34. 31.25
  35. 52.5
  36. 693
  37. 4675
  38. 3420
  39. 2940
  40. 5280

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