Answer
Water: $=\frac{2}{3}$
Butter: $=1\ tbsp$
Milk: $\frac{1}{3}$
Potato flakes: $ \frac{3}{4}$
Work Step by Step
We are given the values for 4 servings. To find the amount needed for two servings, we divide by $\frac{4}{2}=2$. Doing this, we find:
Water: $=\frac{4}{3\times 2} =\frac{2}{3}$
Butter: $=\frac{2\ tbsp}{2} =1\ tbsp$
Milk: $=\frac{2}{3\times 2} =\frac{1}{3}$
Potato flakes: $=\frac{3}{2\times 2} = \frac{3}{4}$