Matrix column percentages

Hi everyone, 

I have an issue on PBI or something that I would like to put which is unavailable. 

This is data from a matrix that I created. Each pink/red row from the column one represent the total, this total is divided from the next rows below this. My issue is that I would like to put for the second column, for each row which should be 100%, be divided in percent below this one.

For example, the first 4 rows would be : 100 %

                                                                40,87 %

                                                                49,6 %

                                                                9,%

An other point, do you know how to put the grandtotals in the center of the column ? 

Thank you very much !