Ken is a tour guide at an art museum. He earns $11 an hour regular pay and receives time-and-a-half for overtime. Last week he worked 40 hours plus overtime. If he made $66.00 in overtime, how many overtime time hours did he work?

He earns $16.50 for one hour of overtime.
He worked 4 hour of overtime.
I figured this out by first finding out how much he earns in one overtime so that equals $16.50. Then you need to divide $66.00 by $16.50 to get 4.