## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$\dfrac{117}{130}$
Multiplying the numerators and multiplying the denominators, the given expression, $\dfrac{9}{10}\cdot\dfrac{13}{13} ,$ is equivalent to \begin{array}{l}\require{cancel} \dfrac{9(13)}{10(13)} \\\\= \dfrac{117}{130} .\end{array}