What are my units when finding % diff. In kinetic energy??? 1. The problem statement, all variables and given/known data Phrank (36.4kg) runs at 2.2 m/s and jumps onto a large stationary skateboard (2.3kg) on which Phrancine (22.7kg) is sitting. After the collision, Phrank, Phrancine, and the skateboard move at 1.3 m/s. Find the kinetic energy before and after the collision along with the percent difference. 2. Relevant equations Kinetic energy before equals= 88.1 J Kinetic energy after= 51.88 J Percent difference= 88.1-51.88 / (88.1 + 51.88/2 ) x 100 = 51.75 WHAT ARE MY UNITS HERE??? 3. The attempt at a solution Need help with my units for percent difference! J is no correct!