According to archemedis.  principle

 

Wt  of liquid displaced = Wt. of the body inserted

 

thus

 

VDg=vdg   where  D and V are density and volume of the iceberg

                           and  d and v are density and volume of the water displaced

 

fraction of  total volume outside will be

 

(V-v)/V = ?

1  -  v/V=1-D/d      ....{from above condition} 

           =1  - 92/103

           =(103-92)/103

           = .107

i.e 11% (approx)