First, whether you have a business or science background in HS, will probably not matter. GPA and rigor are the most important factors in whatever classes you have taken.
One option is Economics with Business as a minor.
Also, you can attempt an internal transfer from LSA to Ross, since there are about 100 internal transfers to Ross per year.
This is unknown. For the Class of 2022, UMich enrolled 447 freshman students. LSA enrolled 4,163 freshman students.
The value of any degree from UMich is in the “eye of the beholder,” as they say. Value is subjective here.