In the United States, grades are typically assigned letter grades ranging from A+ (highest) to F (lowest) . The letter grade B is typically further broken down into B+, B, and B- . The specific percentage ranges associated with each letter grade can vary slightly from school to school, but a common example is: A+ (97–100), A (93–96), A- (90–92), B+ (87–89), B (83–86), B- (80–82), C+ (77–79), C (73–76), C- (70–72), D+ (67–69), D (65–66), D- (below 65), and F (failure) .