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

$-\dfrac{5}{4}$
To find the reciprocal of a number, interchange the numerator and the denominator. Hence, the reciprocal of the given expression, $-\dfrac{4}{5}$, is \begin{array}{l}\require{cancel} -\dfrac{5}{4} .\end{array}