Answer:
87-89%
Step-by-step explanation:
According to the Academic grading of the United States, grading system is constituted as it follows:
Letter grade Percentage
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 63–66%
D- 60–62%
F 0–59%