Arithmetic - "The Cuba Way"

New official public school text-books in Cuba contain arithmetic problems such as this:

"Of the 180 million inhabitants of the United States, one ninth are discriminated against for being Negores and one-sixtieth for being Latin Americans. How many millions of Negroes suffer discrimination in the U.S. and how many Latin Americans?"
- A.P.

Source: Straits Times, Dec 3, 1964