#### Explanation:

Thinking about proportion can help here. First, let call X how much she earns.
So, Adita earns $9.40 = 1hr then, $x = 18.5 h r s$Since these are proportional and equal to hours we could set them into a fraction that money earns equal to hours worked. Hence; ($9.40)/x=(1hr)/(18.5hrs) to remove the denominators, we will multiply both sides of the equation by the denominators(cross multiply)
x*(($9.40)/x)*18.5hrs=18.5hrs((1hr)/(18.5hrs))*x $173.9hrs=x(hr) find x, x is how much she earns.
x=\$173.9