You do not have to create a measure to show the % in a table. You add product as a column value. On the Qty column select the option for a Quick Calc and choose % of GT selection.
You could also do a Matrix table to get the total by country:
You do not have to create a measure to show the % in a table. You add product as a column value. On the Qty column select the option for a Quick Calc and choose % of GT selection.
You could also do a Matrix table to get the total by country: