% of Total Measure

Hello,

I am tyring to figure out how to get the % of Total measure into a PowerPivot table.

My data is structed this way, with columns for Product, Time and Qty.

My pivot table looks like this, with the Product column in the row fields.

I am unsure of which measure to use to get the %TotalQty.

TotalQty = SUMX(FILTER ('Data', 'Data'[Time] = "Current"), 'Data'[Qty])

%TotalQty = ?