If 12 is equal 59 and 39…. If 10 is equal to 57 and 37… combining: 12=59
10=57
———-
12=116

How do I find the next total if 7=116 when 7 is 54 and 15 is 62

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?