Jared is scheduled to work 5/5 of an hour at the school fair. He has already worked 1/3 of an hour. how much longer does he have to work?
5/5 hours is 1 hour
he has worked 1/3 of an hour, or 20 minutes, so
he still has to work 2/3 of an hour, or 40 minutes
somehow I suspect a typo