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Let `V` be the total volume and `V_(i)` the volume of ice piece immersed in water. For equilirum of ice piece, <br> weight=upthrust <br> `:. Vrho_(i)g=V_(i)rho_(w)(g)` <br> Here, `rho_(i)=` density of ice `=900kg//m^(3)` <br> and `rho_(w)=`density of water `=1000 kg//m^(3)` <br> Substituting in above equation, we get, <br> `V_(i)/(V)=(900)/(1000)=0.9` <br> i.e. the fraction of volume outside the water, <br> `f=1-0.9=0.1`.