A grade point average of 3, 6 or grade point average is equivalent to a grade with letters B+ on a 4.0 GPA scale, and a percentage grade of 87 to 89.The GPA, or grade point average, is a simplified number used by colleges and universities to get an idea of overall academic performance. It takes the average of all high school grades and adjusts them on a scale of 0.01 to 4.0 and the numbers are correlated with the grades in letters. A GPA of 3.6 correlates with an A- average, indicative of an academic record consisting of good grades in all subjects. To give an example, let's say you have six B's and four A.
The GPA works by assigning a number to a grade with letters and then averaging those numbers: an A is 4.0 (an A+ is actually 4.3, which is the real upper limit on a 4.0 scale, but only some high schools offer them), B+ is a 3.3, a B is a 3.0, a C is a 2.0, etc.