Afro-Ricans are Puerto Ricans who are black and of African ancestry with little to no white ancestry (unlike the majority of Puerto Ricans). A lot of African ancestry in Puerto Rico actually comes via the other Caribbean islands, the Lesser Antilles.
It is commonly accepted that the Yoruba people of Nigeria were the main African group in Puerto Rico.
Afro-Rican refers to the African components of Puerto Rican culture, primarily in music (Bomba, Plena, Salsa) and food (plantains, mango).
The Afro-Rican identity and culture is not limited to the very few pure blacks or to the a lot more numerous mixed blacks. Even the whiter Puerto Ricans and the really and undoubtedly white Puerto Ricans partake of the African components of the culture.