My school is weird in that it does not give letter grades, only numbers from the 4.0 scale. Also, it's a bit different in that professors can differentiate between awarding a student a 4.0, 3.9, 3.8, etc. For us, a 98-99%=4.0; 96-97%=3.9; etc. I guess we kind of get screwed when LSAC calculates the GPA because only the scaled number appears on our transcript, not the percentage. This also makes it impossible to get over a 4.0 from LSAC at my school.