The population of the United States in July of 2007 was estimated to have surpassed 301,000,000 . At the same time the world population was estimated to be over 6,602,000,000 . What percent of the world population, to the nearest tenth, lived in the United States at this time?
F. 3.1%
G. 3.5 %
H. 4.2 %
J. 4.6 %