## Elementary Algebra

$\dfrac{3}{10}$
Cancelling the common factor between the numerator and the denominator, the given expression, $\dfrac{-24}{-80} ,$ simplifies to \begin{array}{l}\require{cancel} \dfrac{\cancel{-8}\cdot3}{\cancel{-8}\cdot10} \\\\= \dfrac{3}{10} \end{array}