in this question, we are asked to calculate the amount of cheese in a pound cheeses used in each sandwich
This is a straightforward question. The total number or fraction of sandwich is what we want to get. now to get this, we simply divide whatever is in the total by 4.
this is mathematically equal to 1/2 divided by 4 = 0.5/4 = 0.125 or 1/8 pounds of sandwich