Answer
Reciprocal inverse property
Work Step by Step
We are given that $(-\frac{3}{5})\times(-\frac{5}{3})=1$.
This is an example of the reciprocal inverse property, which holds that $a\times\frac{1}{a}=1$, as long as $a\ne0$.
In this example, $a=-\frac{3}{5}$
