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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 722 · 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.The price of a school bag changes from ₹3660 to ₹4209. By what percent did it go up?
  2. 2.A water tank holds 3260 litres. 15% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹2000 to ₹2400. By what percent did it go up?
  4. 4.A town has 3720 people. Its population grows by 20%. How many people live there now?
  5. 5.A town has 4340 people. Its population grows by 25%. How many people live there now?
  6. 6.A town has 1280 people. Its population grows by 10%. How many people live there now?
  7. 7.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  8. 8.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  9. 9.A town has 1040 people. Its population grows by 40%. How many people live there now?
  10. 10.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  11. 11.A shop sells 2700 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  12. 12.A water tank holds 3460 litres. 30% of the water is used. How many litres are left?
  13. 13.A town has 2840 people. Its population grows by 40%. How many people live there now?
  14. 14.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  15. 15.A water tank holds 1540 litres. 30% of the water is used. How many litres are left?
  16. 16.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹260 to ₹364. By what percent did it go up?
  18. 18.A town has 640 people. Its population grows by 10%. How many people live there now?
  19. 19.The price of a school bag changes from ₹460 to ₹483. By what percent did it go up?
  20. 20.A water tank holds 3340 litres. 15% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹3880 to ₹2716. By what percent did it come down?
  22. 22.A shop sells 2880 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  23. 23.A water tank holds 2740 litres. 10% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹220 to ₹198. By what percent did it come down?
  25. 25.The price of a school bag changes from ₹1300 to ₹975. By what percent did it come down?
  26. 26.The price of a school bag changes from ₹3620 to ₹5068. By what percent did it go up?
  27. 27.A water tank holds 1660 litres. 50% of the water is used. How many litres are left?
  28. 28.A town has 2940 people. Its population grows by 30%. How many people live there now?
  29. 29.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  30. 30.A shop sells 1000 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  31. 31.A water tank holds 2500 litres. 40% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹180 to ₹171. By what percent did it come down?
  33. 33.A town has 3200 people. Its population grows by 15%. How many people live there now?
  34. 34.A town has 2940 people. Its population grows by 25%. How many people live there now?
  35. 35.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  36. 36.A shop sells 4800 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  37. 37.The price of a school bag changes from ₹4140 to ₹3933. By what percent did it come down?
  38. 38.A town has 640 people. Its population grows by 30%. How many people live there now?
  39. 39.The price of a school bag changes from ₹2360 to ₹3304. By what percent did it go up?
  40. 40.A shop sells 1520 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?

Answer key

  1. 15
  2. 2771
  3. 20
  4. 4464
  5. 5425
  6. 1408
  7. 43
  8. 55
  9. 1456
  10. 70
  11. 3105
  12. 2422
  13. 3976
  14. 55
  15. 1078
  16. 9.25
  17. 40
  18. 704
  19. 5
  20. 2839
  21. 30
  22. 3312
  23. 2466
  24. 10
  25. 25
  26. 40
  27. 830
  28. 3822
  29. 47.5
  30. 1150
  31. 1500
  32. 5
  33. 3680
  34. 3675
  35. 4.5
  36. 5520
  37. 5
  38. 832
  39. 40
  40. 2128

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