Final answer:
The prevalence of obesity in children ages two to nineteen in the United States is approximately 18.5%.
Step-by-step explanation:
The prevalence of obesity in the United States varies depending on the age group. According to the U.S. Centers for Disease Control and Prevention (CDC), the obesity rate among children ages two to nineteen is approximately 18.5%. This means that about 18.5% of children in the United States today are considered obese.