EPM Calculate %

Hello Experts,

I have new in the BPC 10.0 and i have a doubt repect to the % calculation.

i have a report with this structure.

                     periodic         %        

A                    100           100%

      B                50             50%

      C                50             50%

D                    200            100%

       E               50              25%

       F             100              50%

       G               50             25%

I have a hirarchy wiht level, and i need calculate the porcentaje of the amount repect to the total of the parent level.

in the example A is the level 0 and its value is 100 with represent the 100%

                        B is a child of A and its value 50 represent the 50% of his parent A.

and so on.

how can i do this calculation in BPC 10.0?

Regards.

Carlos.