Answer
$16y$
Work Step by Step
First, we rewrite the given ratio as a fraction: $\frac{4xy}{0.25x}$
Next, we find a common factor that is in both the numerator and the denominator, and factor it out: $\frac{0.25x(16y)}{(0.25x)1}$
When you divide any number by itself, you get $1$, so we can cancel out the common factor. This leaves us with $\frac{16y}{1}=16y$.
