[tex]{Hello,\;There!}[/tex]
They already give you the number of boys {14}, so all you need to do is subtract 30 - 14 which will give you the ratio of girls.
It does this because 14 takes up [tex]\frac{14}{30}[/tex] of the seventh grade class.
[tex]\text{30 - 14 = 16}[/tex]
So your answer is going to be 14:16 un-simplified.
However, since they ask you to put it in the simplest terms, we are going to simplify [tex]\frac{14}{16}.[/tex]
You can do this by dividing both numbers by 2.
= [tex]\frac{14 \div 2}{16 \div 2}=\frac{7}{8}[/tex]
[tex]\bold{So\;your\;answer\;is\;going\;to\;be}[/tex]
[tex]= \frac{7}{8}[/tex] or [tex]\text{7:8}[/tex]
[tex]\rule{300}{1.0}[/tex]
