Row wise calculation

PrasadPatil ,

Create a Measure to calculate Total Sales:

TotalSales = CALCULATE( SUM( Sales1[Sales] ),
                       ALL( Sales1 ))  // Where "Sales1" is the name of your table

Then create a Calculated Column:

Sales_Percent = DIVIDE( [Sales], [TotalSales], 0 )

Use the column tools menu to format as percent or decimal, whichever your preference.

Trust this is what you are looking for.

Regards,