Complex sentence: In the 2010 United States Census, Utica's population was 62,235, of which 69 percent were Caucasian, 64.5 percent were non-Hispanic white (of any race), 15.3 percent were African American, and 0.3 percent were American Indian or Alaska Native.
Split into simpler sentences: In the 2010 United States Census, Utica's population was 62,235. Sixty-nine percent of the population was Caucasian (of which 64.5 percent was non-Hispanic white), 15.3 percent was African American, and 0.3 percent was American Indian or Alaska Native.