crystal reports - Whileprintingrecords Not Working -

i have report doing running total manually ie:

shared numbervar amount:={#amount}; shared numbervar totalamount:=amount+totalamount; amount; 

i have separate formula attempting calculate average dividing amount total amount:

whileprintingrecords; shared numbervar totalamount; if {@amount}<>0 {@amount}/totalamount; 

despite using whileprintingrecords, total amount not displaying actual total, it's displaying total @ time amount printed. doing wrong?

edit: both formulas in footer of group. test removed groups, , had them both in details section, no groups present. removed running total try , take out of mix, no change.

i'm trying calculate percentage each amount contributes total amount. report like

amount | % $100   | 50% $50    | 25% $50    | 25% ____  $200 

instead report ends looking like:

amount | % $100   | 100% $50    | 33% $50    | 25% ____  $200 

there can lot of issues why calculation not carried next formula

1. placement of 2nd formula may wrong compared first formula placement in report.
2. along whileprintningrecords try using evaluateafter.

whileprintingrecords; evaluateafter(@formula1); shared numbervar totalamount; if {@amount}<>0 {@amount}/totalamount;

edit--------------------------------------------------------------------------------------------- problem here @ each level taking total amount not final value. @ first record value 100 , @amount 100..now 100/100 100% @ second record value 50 , @amount 150 % 50/150 33.33. best option use sub report , pass final value 200 input value sub report , display data in sub report.