Answer
$n = 1.95$
Work Step by Step
To solve a proportion, we use the cross products property, multiplying the numerator of one ratio with the denominator of the other ratio, and vice versa:
$13(3) = 20n$
Multiply on the left side of the equation:
$39 = 20n$
Divide each side of the equation by $20$ to solve for $n$:
$n = 1.95$
