Complex sentence: Whites constitute the majority of the U.S. population, with a total of 223,553,265 or 72.4% of the population in the 2010 United States Census, although it drops to 63.7% when Hispanics who describe themselves as "white" are taken out of the calculation.
Split into simpler sentences: Whites constitute the majority of the U.S. population, with a total of 223,553,265 or 72.4% of the population in the 2010 United States Census. There are 63.7% Whites when Hispanics who describe themselves as "white" are taken out of the calculation.