What is $\displaystyle {8}\frac{6}{7} - {3}\frac{4}{7}$?
A. $ {5}\dfrac{2}{7}$
B. $ {6}\dfrac{2}{7}$
C. $ \dfrac{2}{7}$
D. ${5}\dfrac{4}{7}$
E. $ {6}\dfrac{4}{7}$
A. $ {5}\dfrac{2}{7}$
B. $ {6}\dfrac{2}{7}$
C. $ \dfrac{2}{7}$
D. ${5}\dfrac{4}{7}$
E. $ {6}\dfrac{4}{7}$
