43.6% of the  area of lakes in north america is occupied by Lake superior and 13.6% of the area of lakes in north america is occupied by Lake Michigan.
Explanation:
Superior, the biggest of Great Lakes, is also the hugest freshwater lake by covering the region, and the 3rd-largest freshwater lake by size. The Great lake also declared the Great lake of Laurentian and the  Superior Lake is the 2nd  world largest lake by region, and the biggest freshwater lake by region. Michigan  Lake, the particular item of the Great Lakes which  is wholly within the U.S; the others form a water barrier