I have a quick question. I have a friend who has 64.5% in his course. He has an exam coming up worth 30% of his grade. I told him he needs over 16.7% on the exam in order to pass. In that correct?
To learn, in general, how to compute your grade, try here.
How did you arrive at your value? If your friend gets 16.7% of the thirty points represented by the final, then he will be adding only 5.01 points to the 64.5 that he already has. This puts him still below 70 points. How many points are needed for passing?
P.S. See also here.