Read this article and answer this question As of the Fall 2017 quarter, Louisiana Tech had an all-time record high enrollment of 12,873 students pursuing degrees in five academic colleges. The student body has members from every Louisiana parish, 47 U.S. states, and 64 foreign countries. Louisiana residents account for 85.0% of the student population, while out-of-state students and international students account for 11.1% and 4.0% of the student body, respectively. The student body at Louisiana Tech is 69.4% white, 13.3% black, 3.8% international students, and 13.5% other or "unknown" ethnicity. The student body consists of 50.2% women and 49.8% men.
How many percent of the student population are not Louisiana residents?
15