Answer
$\frac{9}{10}\times\frac{x}{2}$
Work Step by Step
The commutative property of multiplication holds that $a\times b=b\times a$.
In this example, we can set $a\times b=\frac{x}{2}\times\frac{9}{10}$.
So, $a=\frac{x}{2}$ and $b=\frac{9}{10}$.
So an equivalent expression would be $b\times a=\frac{9}{10}\times\frac{x}{2}$.
