Question
Shiyun ordered a bowl of macaroni and shared it with Bobby. She ate 19 of it. Bobby ate twice as much macaroni as she did. What fraction of the bowl of macaroni was left?
4 m

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Shiyun ordered a bowl of macaroni and shared it with Bobby. She ate 19 of it. Bobby ate twice as much macaroni as she did. What fraction of the bowl of macaroni was left?