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".
(85 percent + 79 percent + 92 percent + 100 percent)/4 = 89 percent
A b-
In my school, its a B+. 85% or higher is an A.
85% or B
percent.
95.6 percent is an A.
It's just multiplication. 70 percent of your total will be 85 20 percent of your total will be 75 10 percent of your total will be 96 (85 x 0.70) + (75 x 0.25) + (96 x 0.10) = YOUR GRADE AVERAGE