Latex Coder 2

Posted byjaehwa
What is $\displaystyle {9}\frac{6}{7} - {1}\frac{3}{7}$?
A. $ {8}\dfrac{3}{7}$
B. $ {9}\dfrac{3}{7}$
C. $ \dfrac{3}{7}$
D. ${8}\dfrac{6}{7}$
E. $ {9}\dfrac{6}{7}$