PORTION OF A WHOLE | PIE CHART

I agree with eliasayy's solution, below are some additional details but it's the same solution they've given.

Assuming you have a 1:M relationship from Matriculas to Treinamentos, one solution is to add measures to calculate both portions of the visual: 

QTD. TREINAMENTO 1 = 
    CALCULATE(
        COUNTROWS(
            FILTER(
                RELATEDTABLE('Treinamentos de Janiero'),
                'Treinamentos de Janiero'[Treinamento - Nome] = "CNV"
        )
    )
)

MATRICULAS = COUNTROWS(Matriculas)

MATRICULAS WITH NO TREINAMENTO 1 = [MATRICULAS] - [QTD. TREINAMENTO 1]

Add both [QTD. TREINAMENTO 1] and [MATRICULAS WITH NO TREINAMENTO 1] to the visual's Values fields

Note that you will not be able to filter other visuals by selecting the two categories on this visual - if that's required, you'll need a more complex solution.