The percentage of freshman athletes sidelined by Proposition 48 academic standards dropped this year in Division I schools and rose sharply in Division II, the NCAA reported. Division I partial qualifiers who got some kind of financial aid in 1990-91 accounted for 5.6 percent of all freshman athletic scholarship recipients. That was down from 6.5 percent a year ago. Division II went from 9.2 percent to 14.9 percent.