How to calculate % in sales when we calculate sales amount in measures?

Question

If sales and profit amount presents in row by row then it would easy to calculate % of sales.

% of Total Sales = VAR Allsales = CALCULATE( Orders[ALL Total Sales], ALL(Orders) ) VAR Ratio = DIVIDE([Total Sales], Allsales) RETURN RATIO

and then I created another sales amount by using measures like this Sales Amount = CALCULATE(SUMX( 'Sales by Store', 'Sales by Store'[quantity_sold] * 'Sales by Store'[unit_price]))

and when I create % of sales I am unable to divide the sales / all sales * 100 pls help me out [enter image description here][1]

% of Total Sales = VAR Allsales = CALCULATE('Sales by Store'[Sales Amount])

VAR Ratio = DIVIDE('Sales by Store'[Sales Amount],Allsales) RETURN RATIO