At Annville Junior High School, 30% of the students in the Math Club are in the Science Club, and 80% of the students in the

There are 15 in the Science club.  And of these, 80%,  (12)  are also in the Math club.

Let x be the number in the Math club. And  30% of those in the Math club are also in the Science club.

So

.30x = 12   x = 40    And this is the number of students in the Math club.

Here's a Venn diagram

Great job Chris,

This venn diagram was a little tricky :)