When you ask "What is 12 out of 21?" you want to know what percent 12 is out of 21.
Here are step-by-step instructions showing you how we calculated 12 out of 21 as a percentage:
The first step is to divide 12 by 21 to get the answer in decimal form:
12 / 21 = 0.5714
Then, we multiplied the answer from the first step by one hundred to get the answer as a percentage:
0.5714 * 100 = 57.14%
Therefore the answer is 57.14% of students earned a B