Final answer:
The percentage of American children who live with both their biological parents is 66%.
Step-by-step explanation:
The percentage of American children who live with both their biological parents is 66%. According to 2010 census data, 66% of children under seventeen years old live in a household with two married parents. This is a decrease from 77% in 1980. Family structures have become more diverse in recent years, with variations of the nuclear family becoming more common.