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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 534 · 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 price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  2. 2.A town has 3900 people. Its population grows by 50%. How many people live there now?
  3. 3.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  4. 4.A water tank holds 3420 litres. 5% of the water is used. How many litres are left?
  5. 5.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹2860 to ₹3146. By what percent did it go up?
  7. 7.The price of a bicycle is ₹4500. It goes up by 40%. What is the new price (in ₹)?
  8. 8.The price of a bicycle is ₹3120. It goes up by 25%. What is the new price (in ₹)?
  9. 9.The price of a bicycle is ₹3040. It goes up by 40%. What is the new price (in ₹)?
  10. 10.A town has 240 people. Its population grows by 25%. How many people live there now?
  11. 11.A town has 3300 people. Its population grows by 40%. How many people live there now?
  12. 12.A water tank holds 1220 litres. 10% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹1160. It goes up by 20%. What is the new price (in ₹)?
  14. 14.The price of a school bag changes from ₹1660 to ₹1909. By what percent did it go up?
  15. 15.The price of a school bag changes from ₹3780 to ₹5292. By what percent did it go up?
  16. 16.A water tank holds 2760 litres. 25% of the water is used. How many litres are left?
  17. 17.A town has 4700 people. Its population grows by 20%. How many people live there now?
  18. 18.A water tank holds 1760 litres. 50% of the water is used. How many litres are left?
  19. 19.A town has 4140 people. Its population grows by 10%. How many people live there now?
  20. 20.A water tank holds 2340 litres. 15% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹620 to ₹930. By what percent did it go up?
  22. 22.A water tank holds 1000 litres. 40% of the water is used. How many litres are left?
  23. 23.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  24. 24.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  25. 25.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹5000 to ₹4750. By what percent did it come down?
  27. 27.The price of a school bag changes from ₹2840 to ₹2556. By what percent did it come down?
  28. 28.A water tank holds 4400 litres. 50% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹2760 to ₹2346. By what percent did it come down?
  30. 30.A town has 3880 people. Its population grows by 15%. How many people live there now?
  31. 31.The price of a bicycle is ₹4300. It goes up by 30%. What is the new price (in ₹)?
  32. 32.A water tank holds 2840 litres. 40% of the water is used. How many litres are left?
  33. 33.A water tank holds 100 litres. 20% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹980 to ₹1225. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹3260 to ₹4890. By what percent did it go up?
  36. 36.The price of a bicycle is ₹2260. It goes up by 10%. What is the new price (in ₹)?
  37. 37.The price of a bicycle is ₹820. It goes up by 10%. What is the new price (in ₹)?
  38. 38.A shop sells 4960 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  39. 39.A water tank holds 1480 litres. 30% of the water is used. How many litres are left?
  40. 40.The price of a bicycle is ₹4320. It goes up by 15%. What is the new price (in ₹)?

Answer key

  1. 37
  2. 5850
  3. 52
  4. 3249
  5. 70
  6. 10
  7. 6300
  8. 3900
  9. 4256
  10. 300
  11. 4620
  12. 1098
  13. 1392
  14. 15
  15. 40
  16. 2070
  17. 5640
  18. 880
  19. 4554
  20. 1989
  21. 50
  22. 600
  23. 57.5
  24. 72.5
  25. 57.5
  26. 5
  27. 10
  28. 2200
  29. 15
  30. 4462
  31. 5590
  32. 1704
  33. 80
  34. 25
  35. 50
  36. 2486
  37. 902
  38. 5704
  39. 1036
  40. 4968

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