To find the total weight of 12 cases, knowing that each one weighs 6 3/4 pounds, you must set up a multiplication expression: 6 3/4 * 12
Because 6 3/4 is a mixed fraction, convert it to an improper fraction to make multiplying it by 12 more convenient. To do this, multiply the whole number by the denominator and add its product to the numerator to get the numerator of the improper fraction. The denominator will remain the same. When you do that, you should get that the improper form of 6 3/4 is 27/4.
Now that you have 6 3/4 converted to an improper fraction, multiply 27/4*12
This would result in 324/4 which would simplify to 81.
Therefore, your final answer would be that 12 boxes of laundry detergent cases would be 81 pounds. :)
