The 2010 US Census reported that the Latino population in Miami accounted for 70% of its total population, with 34.4% being of Cuban people origin, 15.8% had a Central American background (7.2% Nicaraguan people, 5.8% Honduran people, 1.2% Salvadoran people, and 1.0% Guatemalan people), 8.7% were of South American descent (3.2% Colombian people, 1.4% Venezuelan people, 1.2% Peruvian people, 1.2% Argentinean people, and 0.7% Ecuadorian people), 4.0% had Hispanic people origins (0.5% Spaniard), 3.2% descended from Puerto Rican people, 2.4% were Dominican people (Dominican Republic), and 1.5% had Mexican people ancestry.

Based on the above article, answer a question. How many people, in terms of percentage, were in the 3 smallest subgroups combined?
2.2