#### Answer

$\dfrac{\dfrac{7y+21}{3}}{\dfrac{3y+9}{8}}=\dfrac{56}{9}$

#### Work Step by Step

$\dfrac{\dfrac{7y+21}{3}}{\dfrac{3y+9}{8}}$
Evaluate the division:
$\dfrac{\dfrac{7y+21}{3}}{\dfrac{3y+9}{8}}=\dfrac{7y+21}{3}\div\dfrac{3y+9}{8}=\dfrac{8(7y+21)}{3(3y+9)}=...$
Take out common factor $7$ from the parentheses in the numerator and common factor $3$ from the parentheses in the denominator. Then, simplify:
$...=\dfrac{8(7)(y+3)}{3(3)(y+3)}=\dfrac{8(7)}{3(3)}=\dfrac{56}{9}$