Need to calculate % in pie chart

[Ritesh_143242]

Role level 1  Role level 2. Total

Engg               QA.                   157

Other               BA.                 34

Xyz.                   REM

I need If( Role level 1,'BA'),Role level 2 

And it will like 34/157

How we do? 

Please help me

[martinpohl]

create a bar chart, Role level 2 as dimension and sum(Total)/sum(total Total) as expression.

Regards