Are you quoting a recent breakdown? I've seen them where 85% plus of the population claim "Brasilian" ancestry, which is a little of everything.
I've met many Brasilians, but at least half of them had some black ancestry. I've met the descendants of Cabral, which was pretty cool.
Ethnic groups
48.43% White
43.80% Brown (Multiracial)
6.84% Black
0.58% Asian
0.28% Amerindian
I used to know a guy named Cabral, a Portugese from Mass.