1. The problem statement, all variables and given/known data A boat with a density of 0.75 g/cc is floating in water. What percentage of the boat is floating above the surface of the water? 2. Relevant equations I don't know any general formulas for buoyancy. I was hoping someone here could provide one. 3. The attempt at a solution I understand that the density of water is 1 g/cc, so is it really as easy as understanding 1-0.75, or is that simply a coincidence. I know the answer is 25% and expected a rather low number due to the rather low density, but what is the exact procedure for solving this problem?