Running percent of total in pivot table

Pivot table function does not have ‘Running percent of total’. Result showed in example is after applying ‘percent of total’ function from Quick Sight.

I need same function like ‘running total’ but in percentage which is not listed.
R1C1 R1C2
Count1% Count1%+Count 2% And so on

Is there any other way it can be done, percent value is based on count aggregate.