Solution Provider

What is ${3} \dfrac{1}{8} - {2}\dfrac{4}{7}$?
A. $\dfrac{31}{56}$
B. $ {1} \dfrac{31}{56}$
C. $ {2} \dfrac{31}{56}$
D. $ {4} \dfrac{31}{56}$
E. $ {3} \dfrac{31}{56}$