To start off, let's cross-multiply this proportion. We get the following:
[tex]15a=8b[/tex]
Now, divide both sides by 8
[tex] \frac{15a}{8}=b[/tex]
Now, divide both sides by 15
[tex]\frac{a}{8}=\frac{b}{15} [/tex]
That's your answer. Hope this helps! :)
