As of the census of 2000, there were 197,790 people, 84,549 households, and 43,627 families residing in the city. The population density was 3,292.6 people per square mile (1,271.3/km²). There were 92,282 housing units at an average density of 1,536.2 per square mile (593.1/km²). The racial makeup of the city was 57.2% African American (U.S. Census), 38.3% White (U.S. Census), 0.2% Native American (U.S. Census), 1.3% Asian (U.S. Census), 0.1% Pacific Islander (U.S. Census), 1.5% from Race (United States Census), and 1.5% from two or more races. Hispanic (U.S. Census) or Latino (U.S. Census) of any race were 2.6% of the population.

How many more people, in terms of percentage of the population, were solely African American compared to solely White?
18.9