Hi, 
You can find the man to women ratio by creating a calculative field and write code as 
DIV([Man],[Women])     OR    [Man] / [Women]  , here [Man] and [Women] are the fields.
 Religion    |      Ratio
----------------------------------
  hindu       |     2.034897
 Muslim     |      1.32176
Put the religion on row shelf and the ratio on column shelf then, the ration will be seen for each religion. (like above)
Hope this helps you.