Conditional formatting logic keeps reverting back to percent/number

I really apreciate your time on this one Bibiano_Geraldo.

It's funny that by the time you were writing your answer I was replying to Jai-Rathinavel's suggestion and mentioning the same finding you had, which is the one that concerns the fact that the formatting stays consistent across months whether or not a filter is applied.

And I agree that the use of ALL/REMOVEFILTERS, etc. on any of the measures that lead up to 'Ticket médio ASA %' might be the culprit on this one.

Below is a compilation of all measures that lead up to 'Ticket médio ASA %' being 'fVendas' the facts table containing all sales-related data and 'dCalendario' being the dates/calendar table:

Ticket médio ASA % = -- It divides...
DIVIDE (
    [Ticket médio ASA], -- ... the difference between this year's and last year's measure.
    [Ticket médio AA], -- ... by the prior year's measure.
    0
)

Ticket médio ASA = 
VAR ValorPeriodoAtual = [Ticket médio] -- This year's measure.
VAR ValorPeriodoAnterior = [Ticket médio AA] -- Last year's measure.
VAR Resultado =
    IF (
        NOT ISBLANK ( ValorPeriodoAtual ) && NOT ISBLANK ( ValorPeriodoAnterior ),
        ValorPeriodoAtual - ValorPeriodoAnterior
    )
RETURN
    Resultado

Ticket médio AA = -- Last year's measure.
IF (
    [MostrarValorParaDatas],
    CALCULATE (
        [Ticket médio],
        CALCULATETABLE (
            DATEADD ( dCalendario[Data], -1, YEAR ),
            dCalendario[DataComTransações] = TRUE
        )
    )
)

MostrarValorParaDatas = -- Check whether each respective date had sales.
VAR UltimaDataComDados =
    CALCULATE (
        MAXX ( { MAX ( 'fVendas'[Mês/Ano] ), MAX ( 'fVendas'[Data] ) }, [Value] ),
        REMOVEFILTERS ()
    )
VAR PrimeiraDataVisivel =
    MIN ( 'dCalendario'[Data] )
VAR Resultado =
    PrimeiraDataVisivel <= UltimaDataComDados
RETURN
    Resultado

Ticket médio = -- It divides...
DIVIDE(
    [Faturamento], -- ... this year's sales dollars.
    [Quantidade de vendas], -- ... by this year's sales volumes.
    0
)

Quantidade de vendas = -- This year's sales volumes.
VAR Tabela_Prov = SUMMARIZE(
    fVendas,
    fVendas[Mês/Ano],
    "NF Cont", DISTINCTCOUNTNOBLANK(fVendas[Nota Fiscal])
)
RETURN
SUMX(
    Tabela_Prov,
    [Contagem de vendas]
)

Contagem de vendas = DISTINCTCOUNTNOBLANK(fVendas[Nota Fiscal])

Faturamento = -- This year's sales dollars.
SUMX( 
    fVendas,
    (fVendas[Quantidade] * fVendas[Preço Unitário]) - fVendas[Desconto] + fVendas[Acréscimo]
)

 The only measure that uses REMOVEFILTERS is [MostrarValorParaDatas] which is a hidden measure within the 'dCalendar' table used just to check whether each respective date had sales.

I actually removed that measure within [Ticket médio AA] by getting rid of the IF statement but the problem persisted, so it doesn't look like the problem resides there.