Final answer:
Less than 5 percent of adults worldwide are estimated to be transgender, with varying reports due to survey methodologies and regional differences in self-identification.
Step-by-step explanation:
Less than 5 percent of adults worldwide are transgender. This estimate includes a range of reported percentages, with some studies suggesting around 1.4 million adults in the United States, or approximately 0.6% of the adult population, identify as transgender, and others indicate this might be as high as 2 percent among high school students in the U.S. Understanding the exact percent of transgender individuals is complex due to varying factors such as differing methodologies in surveys and regional differences in willingness to self-identify as transgender. Nonetheless, it highlights the importance of recognizing diverse gender identities within the global population.