Question

The ratio of boys to girls in the 9th grade is approximately 7 to 9. There are 228 girls. How many boys are there?

Answer 1

Approximately 177 boys

Explanation:

Let

x ----> the number of boys

y ----> the number of girls

we know that

`(x)/(y)=(7)/(9)`

isolate the variable x

`x=(7)/(9)y` ----> equation A

`y=228` ----> equation B

substitute equation B in equation A

`x=(7)/(9)(228)`

`x=177.33`

therefore

Approximately 177 boys