Latex Coder 2

Posted byjaehwa
What is $\displaystyle {7}\frac{4}{5} - {6}\frac{2}{5}$?
A. $ {1}\dfrac{2}{5}$
B. $ {2}\dfrac{2}{5}$
C. $ \dfrac{2}{5}$
D. ${1}\dfrac{1}{5}$
E. $ {2}\dfrac{1}{5}$