15 out of 21 as a Percentage
15 out of 21 is 71.43%, which is a letter grade of C-.
Percentage
71.43%
Letter Grade
C-
Wrong Answers
6
Simplified
5/7
Understanding the Calculation
To convert 15 out of 21 into a percentage, divide the correct answers (15) by the total questions (21) and multiply by 100:
(15 ÷ 21) × 100 = 71.43%
With 15 correct answers out of 21, you got 6 wrong. The fraction 15/21 simplifies to 5/7. On the standard grading scale, 71.43% corresponds to a C-.