Removing my averages thanks for your time and apologies if this is far too simple for this group. 
I am trying to remove my average from a total average.  Meaning:
The total average for a subset of data is 55.  I am 29% of this subset and my average is 52.  
If I were to remove myself from the equation, how could I find the average of the remaining 71% without me?

Let $x$ denote your average and let $y$ denote the average of the rest. The overall average is $0.29x+0.71y=55$. You know that $x=52$. Just solve for $y$.
