In this question there are several information's that have to be looked at first.
Number of hours per week Lola works as dog sitting = 18 hours
Total amount Lola earns per week = $205.50
So
Lola in 18 hours earns = 205.50 dollars
Then the amount earned by Lola in 1 hours = 205.50/18 hours
= 11.416 dollars
= 11.42 dollars
So it can be said that Lola earns $11.42 per hour doing dog sitting. I hope to have answered your query to your satisfaction. This method can be followed in future to answer similar questions.