Final answer:
While exact percentages for American adults aged 25 to 29 living with their parents are not specified in the resources up to 2016, there is a notable trend indicating more young adults live at home, reflecting changes in family structure and cohabitation rates.
Step-by-step explanation:
The question concerns the percentage of American adults aged 25 to 29 who are living with their parents. According to the information available up to 2016, a noteworthy trend exhibits that a larger fraction of young adults in the United States were residing with their parents than at any other time since the early 1900s. This mirrors broader changes in family structures and living arrangements among various age groups in the U.S. Despite the increasing cohabitation rates among 25- to 34-year-olds, the given data does not specify the exact percentage for the 25 to 29 age group. However, it indicates evolving family dynamics, such as the rise in single-parent households and the shifting compositions of households that depart from the traditional nuclear family model.