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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