What is 21 is what percent of 50?

To find out what percent 21 is of 50, you can set up a proportion using the following formula:

(21 / 50) x 100 = ?

Divide 21 by 50 to get 0.42. Then, multiply 0.42 by 100 to get the final answer.

Therefore, 21 is 42% of 50.