## Elementary Algebra

$\dfrac{7b^2}{17a}$
Cancelling the common factor in the numerator and the denominator, the given expression, $\dfrac{7a^2b^3}{17a^3b} ,$ simplifies to \begin{array}{l}\require{cancel} \dfrac{\cancel{a^2b}\cdot7b^2}{\cancel{a^2b}\cdot17a} \\\\= \dfrac{7b^2}{17a} .\end{array}