[tex]\frac{3}{8}[/tex]
When you write a ratio into a fraction, always remember that the 1st number will be at the top (numerator) and the 2nd number will be at the bottom (denominator).
3 is the 1st number so it is our numerator.
8 is the 2nd number so it is our denominator.
[tex]\frac{3}{8}[/tex]
It is already simplified form, so [tex]\frac{3}{8}[/tex] is the answer.
