Complex sentence: African Americans comprised just over 50 percent of the victims of lynching in other parts of Missouri, but in these seven counties, more than 90 percent of lynch victims were black, and they were overwhelmingly men.
Split into simpler sentences: African Americans comprised slightly more than 50 percent of the victims of lynching in other parts of Missouri. In these seven counties, more than 90 percent of lynch victims were black, and they were overwhelmingly men.