How do you convert 80 ounces into pounds?

There are 16 ounces (weight) in a pound. 80oz divided into groups of 16 oz each will result in 5 equal groups. So, there are 5 pounds in 80 oz. In order to create these groups, you can subtract 16 oz. at a time from the 80oz. you started with, keeping track of how much is left over each time, so you know if any is left over (not a full 16 oz. pound) at the end. Each left over ounce, if you started with some other original amount, would be 1/16th of a pound, or .0625 lb.