what is the difference between a and a minus?
On a standard grading scale 90 to 100 percent or above is an A. An A- would be between 90.0 and 90.3 or 90.4. Some teachers who offer extra credit don't give an A+ unless you are over 100 percent. However, an A is with 4 points toward your g.p.a.and that plus or minus doesn't change that.