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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 356 · 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 price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹1680 to ₹1932. By what percent did it go up?
  3. 3.A town has 1160 people. Its population grows by 10%. How many people live there now?
  4. 4.A town has 4140 people. Its population grows by 40%. How many people live there now?
  5. 5.A water tank holds 1360 litres. 5% of the water is used. How many litres are left?
  6. 6.A shop sells 3420 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  7. 7.The price of a bicycle is ₹4280. It goes up by 25%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹220 to ₹154. By what percent did it come down?
  9. 9.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  10. 10.A shop sells 1560 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  11. 11.A water tank holds 4140 litres. 25% of the water is used. How many litres are left?
  12. 12.A town has 3980 people. Its population grows by 40%. How many people live there now?
  13. 13.The price of a school bag changes from ₹1700 to ₹1360. By what percent did it come down?
  14. 14.A water tank holds 4980 litres. 50% of the water is used. How many litres are left?
  15. 15.A shop sells 700 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  16. 16.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  17. 17.A water tank holds 1960 litres. 5% of the water is used. How many litres are left?
  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.The price of a school bag changes from ₹4460 to ₹4906. By what percent did it go up?
  20. 20.A water tank holds 400 litres. 15% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹4020 to ₹5025. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹4500 to ₹3600. By what percent did it come down?
  23. 23.A water tank holds 680 litres. 25% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹1840 to ₹1656. By what percent did it come down?
  25. 25.A town has 3680 people. Its population grows by 15%. How many people live there now?
  26. 26.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  27. 27.A water tank holds 640 litres. 15% of the water is used. How many litres are left?
  28. 28.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  29. 29.The price of a school bag changes from ₹1200 to ₹1500. By what percent did it go up?
  30. 30.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  31. 31.The price of a school bag changes from ₹1100 to ₹550. By what percent did it come down?
  32. 32.The price of a bicycle is ₹2000. It goes up by 25%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹2280 to ₹2850. By what percent did it go up?
  34. 34.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  35. 35.A water tank holds 2900 litres. 10% of the water is used. How many litres are left?
  36. 36.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  37. 37.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  38. 38.A water tank holds 1320 litres. 20% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹3380 to ₹4394. By what percent did it go up?
  40. 40.The price of a bicycle is ₹1940. It goes up by 50%. What is the new price (in ₹)?

Answer key

  1. 21
  2. 15
  3. 1276
  4. 5796
  5. 1292
  6. 3591
  7. 5350
  8. 30
  9. 62.5
  10. 1638
  11. 3105
  12. 5572
  13. 20
  14. 2490
  15. 875
  16. 82
  17. 1862
  18. 37
  19. 10
  20. 340
  21. 25
  22. 20
  23. 510
  24. 10
  25. 4232
  26. 4.5
  27. 544
  28. 28.75
  29. 25
  30. 24
  31. 50
  32. 2500
  33. 25
  34. 72.5
  35. 2610
  36. 10.25
  37. 23.5
  38. 1056
  39. 30
  40. 2910

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