You can do this using Measure Names / Measure Values and also a table calculation on the Count to make it a percent of total. I've attached a workbook to demonstrate. You might have to right click the table calculation field and click "Edit Table Calculation" and change the settings based on what you want as your scope.
I've attached a workbook to demonstrate.
Measure Names & Measure Values.twbx 551.8 KB
Thanks for the reply Joshua.
This would satisfy a part of my requirement.
But this solution shows %age corresponding to all the numbers. What I want is that the %ages should be visible only for the Subtotals or the Grand Totals cells only.
I tried hiding the cells but that hides the Sub Totals and Totals as well.