how to add percentage total below the total entry..

[edgarbenilde]

can somebody help me how can i add percentage per column of the total and result total also as 100%


see the image attached..

Month       Playing               Reading                      Total          Percentage
1               1                         2                             3                17.65% 
2               1                         3                             4                 23.53%
5               2                         2                             4                23.53%
4               1                         2                             3                17.65%
8               2                         1                             3                17.65%
Total          7                         10                           17               100%
% total    (41.18%)              (59.82%)                  (100%) 

those bold line i want to add it... please help me how? please see the status of my report in the image..