13 out of 21 as a Percentage
13 out of 21 is 61.90%, which is a letter grade of D-.
Percentage
61.90%
Letter Grade
D-
Wrong Answers
8
Simplified
13/21
Understanding the Calculation
To convert 13 out of 21 into a percentage, divide the correct answers (13) by the total questions (21) and multiply by 100:
(13 ÷ 21) × 100 = 61.90%
With 13 correct answers out of 21, you got 8 wrong. The fraction 13/21 simplifies to 13/21. On the standard grading scale, 61.90% corresponds to a D-.