Posted by **Losa** on Thursday, October 11, 2012 at 2:10am.

I don't get the first problem of my homework. We learned three lessons today, the increase, decrease, and finding the base number. But i don't know which one I should use. Please help with this problem: There are 12 girls in Mr. Cooper's class. The girls make up 40% of the class. How many students are in the class?

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