Rita and alicia are each paid by the hour reader works 5 and 1/2 hours and earn $77 eliseo works 3 3/4 hours and $60 to hourly rate is greater

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?