The measurement around the trunk of a tree just below shoulder height is called girth. The largest known american beech tree in the United States has a girth of 24 1/6 feet. The largest known sugar maple tree in the United states has a girth of 19 5/12 feet. How much larger is the girth of the largest known American beech tree than the girth of the largest known sugar maple tree?

Please help I don’t understand at all!!