21 out of 21 as a Percentage
21 out of 21 is 100.00%, which is a letter grade of A.
Percentage
100.00%
Letter Grade
A
Wrong Answers
0
Simplified
1/1
Understanding the Calculation
To convert 21 out of 21 into a percentage, divide the correct answers (21) by the total questions (21) and multiply by 100:
(21 ÷ 21) × 100 = 100.00%
With 21 correct answers out of 21, you got 0 wrong. The fraction 21/21 simplifies to 1/1. On the standard grading scale, 100.00% corresponds to a A.