Power Bi Calculate denominator for month by month percent

[dicken]

Hello,
I would like to calculate the percent of sales within each month,

Monthly % = 
VAR num = [Total Sales] 
VAR den = CALCULATE([Total Sales],ALLEXCEPT(Alls,Alls[Dates]) ) 
VAR anser = DIVIDE(num , den ) 
RETURN anser

But this is not what I want , I want to access the Month from the hierarchy not 'dates', but I need Month, in Power query the option is available even if you only initially start with a date column, or is there a way to get to the Month?
Richard.

[CODE=vba]

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[dicken]

Just to follow up I added a Month Column and used that and was then able do get what I wanted, but if anyone has any better ideas please let me know.

RD