Kalyn is trying out a new recipe that calls for 5 cups of flour and 1 cup shortening. She only has $\frac{2}{3}$ cup of shortening, and uses all of it. How much flour should she use to keep the ingredients in the same ratio as called for in the recipe?
(A) $2 \frac{1}{3}$
(B) $3 \frac{1}{3}$
(C) $1 \frac{2}{3}$
(D) $1 \frac{1}{3}$
(E) 2
In the recipe, the ratio of volume of flour to volume of shortening is $5: 1$. Since she uses $\frac{2}{3}$ cup of shortening, then to keep the same ratio as called for in the recipe, she must use $5 \times \frac{2}{3}=\frac{10}{3}=3 \frac{1}{3}$ cups of flour.

Answer: (B)