What percent of children in the united states live in low income families

44 percent

Explanation:

Children in the USA consist of about 23% of the population that below the age group of 18 years and they comprise of about 32 %of people in poverty. And amongst them abut 44% live in poverty or low-income families. That is about 1 in 5 children that are presented by the 21% of the population of the country. About 72 million children in the U.S.A. And this trend goes on increasing form 2008 onwards.

The 3rd one