1. The problem statement, all variables and given/known data This is a simple question but I can't seem to solve it( I don't know if this is advanced physics or not first time on this website, it said Work and that is part of this energy loss problem) here is the problem: What percentage of its gravitational potential energy does a squash ball lose if it falls from 3.0 m and returns to a height of .076 after bouncing once? 2. Relevant equations (100-x)(Ek1 + Eg1)/100 = Ek2 + Eg2 Ek = 1/2mv² Eg = mgh 3. The attempt at a solution Honestly, my Teacher did not give any example on a question with no "x" variable like this one, so literally I had no clue on how to attempt this question.