"Penn admitted 18.5 percent of its early decision applicants for the Class of 2022, a dramatic drop from last year’s 22 percent ED rate and the previous year’s 23.2 percent rate.
Penn also received a record-breaking 7,074 early decision applications this year, a 15 percent increase from last year’s 6,147 applicants. Since the Class of 2018 applied, the early decision application pool has grown 38 percent, according to a press release from Penn Admissions.
Of those accepted this year, 25 percent had a parent or grandparent who had attended Penn, as opposed to the 16 percent of legacy applications received in November. Eleven percent of accepted students are first-generation college students, which is consistent with the percentage of first-generation applications received this year." …
http://www.thedp.com/article/2017/12/early-decision-upenn-ivy-league-philadelphia-admissions-rate