To find how many servings John can make we need to write as a relationship, this means that
[tex]\begin{gathered} 6c\Rightarrow4s \\ 30c\Rightarrow? \end{gathered}[/tex]to find the missing value we need to solve the relationship
[tex]\begin{gathered} ?=30c\cdot\frac{4s}{6c} \\ ?=5\cdot4s \\ ?=20s \end{gathered}[/tex]he can make 20 servings with 30 cups of ice cream
