Answer:
[tex]\frac{a}{b}=c[/tex] which agrees with the third answer in your list of answer options
Explanation:
Start with:
[tex]a=b\,*\,c[/tex]
divide both sides by b to isolate c on the right:
[tex]\frac{a}{b} =\frac{b\,*\,c}{b} \\\frac{a}{b} =c[/tex]