In university, how can you get a 4.0 with an 85% average? In high school they added 1.0 to honors courses but I don’t remember the same thing happening in undergrad.
Grade inflation is common at many schools. And many difficult technical classes grade on a curve, sometimes to the point where you can get an A with an 85%.
But yeah, I still don't see how an 85% average would be a 4.0.