Question

In a certain year, 87% of all Caucasians in the U.S., 74% of all African-Americans, 74% of all Hispanics, and 82% of residents not classified into one of these groups used the Internet for e-mail. At that time, the U.S. population was 69% Caucasian, 10% African-American, and 11% Hispanic. What percentage of U.S. residents who used the Internet for e-mail were Hispanic?