Afull bag of dog food weighs 5 1 2 pounds. how much dog food do you have if there are 3 3 4 bags in the cupboard

Now, we know there are 3 and 3/4 bags in the cupboard, and each one of them weights 5 and 1/2 lbs, so the amount in the cupboard is just their product.

now, let's firstly convert the mixed fractions to "improper" and do the product after,

Subtracting is the opposite of adding