Answer
$\dfrac{b}{9}$
Work Step by Step
Rewrite this fraction as a division problem:
$\dfrac{1}{3} \div \dfrac{3}{b}$
To divide one fraction by another, multiply the first fraction by the reciprocal of the second fraction:
$=\dfrac{1}{3} \times \dfrac{b}{3}$
Multiply the numerators together, and multiply the denominators together:
$=\dfrac{b}{9}$