#### Answer

$8(5p-4r)$

#### Work Step by Step

$\bf{\text{Solution Outline:}}$
To factor the given expression, $
40p-32r
,$ factor the $GCF.$
$\bf{\text{Solution Details:}}$
The $GCF$ of the terms in the given expression is $
8
,$ since it is the greatest expression that can divide all the terms evenly (no remainder.) Factoring the $GCF$ results to
\begin{array}{l}\require{cancel}
8(5p-4r)
.\end{array}