Original sentence: But the Wall Street Journal study was based on the percentage of students attending the best graduate programs.The University of Virginia (2.6%) easily outpaced the small liberal arts universities of its state such as Washington and Lee University (1.7%) and the College of William and Mary (0.8%)
Edited sentence: But the Wall Street Journal study was based on the percentage of students attending the best graduate programs, and the University of Virginia (2.6%) easily outpaced the small liberal arts universities of its state such as Washington and Lee University (1.7%) and the College of William and Mary (0.8%) on this size-adjusted basis