Mr. Chang's class has 28 students, 4/7 of whom are girls. Which equation shows how to determine the number of girls in Mr. Chang's class?

A. 28 : 4/7 = 49

B. 28 x 4/7 = 16

C. 4/7 : 28 = 1/49

D. 7/4 : 28 = 1/16

Okay, so we know a number of students and the amount of girls as a bracket. So what we have to do now is multiply them with each other.

28 * 4/7 = 16

So there are 16 girls in Mr. Chang's class.

You can also determine the boys by - the students with the girls:

28-16=12 boys

Have a nice day : D