Question
At a new year party, every adult brought 1 or 3 children. If the ratio of the number of adults to the number of children was 7 : 9, what fraction of the adults who brought 1 child?
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At a new year party, every adult brought 1 or 3 children. If the ratio of the number of adults to the number of children was 7 : 9, what fraction of the adults who brought 1 child?