Question

The ratio of boys to girls in the 9th grade is 5 to 6. There are 312 girls. Set up a proportion to model this information. Answer Choices are in the attachments.

Answer 1

Boys:Girls=5:6
$\frac{boy}{girls} = \frac{5}{6}$
but girls = 312
Hence
b/312=5/6
option b is the answer

Answer 2

Use fractions with the number of boys on top and the number of girls on the bottom ($\frac{5}{6}$). Use ‘b’ to represent the number of boys ($\frac{b}{312}$)  . Set the two fractions equal to create the proportion.

$\frac{5}{6}$=$\frac{b}{312}$