18 out of 21 as a Percentage
18 out of 21 is 85.71%, which is a letter grade of B.
Percentage
85.71%
Letter Grade
B
Wrong Answers
3
Simplified
6/7
Understanding the Calculation
To convert 18 out of 21 into a percentage, divide the correct answers (18) by the total questions (21) and multiply by 100:
(18 ÷ 21) × 100 = 85.71%
With 18 correct answers out of 21, you got 3 wrong. The fraction 18/21 simplifies to 6/7. On the standard grading scale, 85.71% corresponds to a B.