A 2.7 grade point average that is based on a 4.0 scale is equivalent to a letter grade of B- and a percentile range of 80 to 83 percent. Most colleges and many high schools use a 4.0 GPA system, although some use a 4.3 scale.
GPAs are calculated by using a formula that translates a letter grade into a numerical score, which is then multiplied by the number of credits the class is worth. Additional weights are often added based on the difficulty of the course. Since not all schools use the same grading system and weights, GPAs are not standardized. Colleges often apply other variables to high school GPAs when reviewing GPAs for admission decisions.