Complex sentence: Under president Williams' leadership, the City College of New York achieved a decade of growth; enrollment increased by 60-percent and academic standards improved significantly, while nearly 90 percent of the student body continued to represent racial minority groups.
Split into simpler sentences: Under president Williams' leadership, the City College of New York achieved a decade of growth. Enrollment increased by 60-percent and academic standards improved significantly, while nearly 90 percent of the student body continued to represent racial minority groups.