math
posted by edwin .
in a class of 40 students, 80% are business majors. of the 24 students who passed the midterm exam, 75% are business majors. What percertange of students in the class who are not business majors passed the examination

80% of 40 = 32
So  8 students are not business majors.
75% of 24 = 18
So 6 nonbusiness majors passed the test.
What percentage is 6 out of 8? 
I love Pre Alegbra but i don't get it

If you post a couple of the problems you don't get, we'll be glad to help you.

Out of 39 students in a finite math class, 25 are male, 23 are business majors, 24 are firstyear students, 15 are male business students, 18 are male firstyear students, 16 are firstyear students who are business majors, and 12 are male firstyear business majors.