Final answer:
Approximately 28% of adults suffer from an anxiety disorder at some time in their lives.
Step-by-step explanation:
The approximate percentage of adults who suffer from an anxiety disorder at some time in their lives is 28%. According to the Anxiety and Depression Institute of America, 28% of U.S. adults are likely to be affected by an anxiety disorder over the course of a lifetime. It is important to understand that occasional feelings of anxiety are normal, but anxiety disorders are more long-lasting and intense.