Write an Equation $2 \frac{1}{5}$ Pounds of Flour $1 \frac{2}{5}$ Pounds of Flour

Write an equation. Then, solve and check.
-A pancake recipe calls for $2 \frac{1}{5}$ pounds of flour. David already has $1 \frac{2}{5}$ pounds of flour. How many more pounds does he need?

A) $x-1 \frac{2}{5}=2 \frac{1}{5} ; x=3 \frac{3}{5} \mathrm{lb}$
B) $1 \frac{2}{5}+\mathrm{x}=2 \frac{1}{5} ; \mathrm{x}=\frac{4}{5} \mathrm{lb}$
C) $x-1 \frac{2}{5}=2 \frac{1}{5} ; x=\frac{4}{5} \mathrm{lb}$
D) $1 \frac{2}{5}+\mathrm{x}=2 \frac{1}{5} ; \mathrm{x}=3 \frac{3}{5} \mathrm{lb}$