Homework Help: 7th grade math

Posted by Mercedez on Tuesday, November 15, 2011 at 9:06pm.

There are 48 students in a school play. The ratio of boys to girls is 5:7. How many boys are in the school play? Explain how you found your answer.

7th grade math - Ms. Sue, Tuesday, November 15, 2011 at 9:15pm
I'd set up a proportion (ratio).

5/12 = b/48

12b = 240

b = 20
7th grade math - Mercedez, Tuesday, November 15, 2011 at 9:21pm
Where did you get the 5/12 from when it's 5/7?
7th grade math - Ms. Sue, Tuesday, November 15, 2011 at 9:24pm
You're comparing the number of boys with the total.

5 + 7 = 12

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