What percentage of adults are so tired that it interferes with their daily activities?

The correct percentage of adults who report being so tired that it interferes with their daily activities is 40%. This figure highlights the prevalence of fatigue among the adult population, indicating that a significant number of individuals struggle with tiredness to the extent that it affects their day-to-day tasks and overall quality of life. This could be attributed to various factors, including lifestyle choices, stress, sleep disorders, and work-related fatigue. Understanding the impact of fatigue can help inform public health initiatives and promote better sleep hygiene, work-life balance, and stress management strategies to improve overall well-being.