Percent of u. s. children under the age of 18 live with two married parents, down from 77 percent in 1980, and percent live in low-income households.

65 percent of U.S. children under the age of 18 live with two marrieid parents, down from 77 percent in 1980, and 44 percent live in low-income households.

Explanation:

1. According to the U.S. Census Bureau (Current Population Survey), most of the children (69%) in the United States of America lives with both of their parents. Out of this percentage, 4% lives with two cohabitating parents, while 65% lives with two married parents. Even though this is the predominant way of life for most of the children in the USA, there has been a long-term shift in composition of families since 1980. There has been a decreasement of share of children who live with both of their parents, whereas single-parent households became more common.

2. According to the U.S. Census Bureau, low-income household is considered 200% of the federal poverty level. In 2013, a family of four who made $47,248 was considered as a low income family. That makes a 44% of children under the age of 18, or a number of 31.4 million children living in a low-income household.