The mixed fraction $$ 5 \dfrac{4}{7} $$ can be expressed as
Correct option is B. $$ \dfrac{39}{7} $$
An improper fraction is obtained by adding the whole part with a fractional part of a mixed fraction.
$$ 5\dfrac{4}{7}$$ can be expressed into improper fraction as ,
$$ = \dfrac{ 5×7+4}{7}$$
$$ = \dfrac{35+4}{7} $$
$$ = \dfrac{39}{7}$$
$$\therefore \textbf{Option B is correct.}$$