The stemplot below displays midterm exam scores for 30 students taking a calculus course. The highest possible test score was 100. The teacher declared that an exam grade of 65 or higher was good enough for a grade of C or better. 3 6 8 4 1 8 5 3 3 4 4 9 2 3 3 5567 7 0 1 23 5668 8 1 1 3 5 a 9 0 3 9 The percent of students earning a grade of C or higher (as declared by the teacher and rounded to the nearest percent) is: 65 %