Total number of members: 37
Males: 18
Ratio of males to all club members:
[tex]\begin{gathered} \#males\colon\#\text{club menbers} \\ \\ 18\colon37 \\ \\ \\ \frac{\#\text{males}}{\#\text{club members}} \\ \\ \frac{18}{37} \end{gathered}[/tex]Then, the ratio of males to all club members is 18:37 or 18/37