Complex sentence: If only the upper peninsula of Michigan were included in the proposed "State of Superior," it would currently have the smallest population, with its 320,000 residents representing only 60% of Wyoming's population, and less than 50% of Alaska's.
Split into simpler sentences: If only the Upper Peninsula of Michigan were considered for the "State of Superior," it would currently have the smallest population. For instance, its 320,000 residents would represent only 60% of Wyoming's population, and less than 50% of Alaska's.