It depends on what sort of thing you're talking about.
If it's an exam (meap, Explorer, SAT, PCAT and so on) you've gotten an A-.
If it's a school grade you got a B, B+ or b-.
B
The letter grade for an 85 is a B.
An 85% is a B.
71.4 84*.85+0*.15=71.4
Hopefully an F since you can't even spell "letter".
A b-
(85 percent + 79 percent + 92 percent + 100 percent)/4 = 89 percent
In my school, its a B+. 85% or higher is an A.
85% or B
95.6 percent is an A.
percent.
A