1(67/2) - 0.5 = (?) (wtf is it with this dude and numbers?!)

Remember that song, by Linkin Park? Numb(ers)? It has nothing to with this video, but as an autistic dude I have a deep inherent passion for the spontaneous recital of cultural memetic tropes and a love for systems logic (and subsequently mathematics, number theory, etc). So the fact that these phenomena have seemingly converged into it being relevant to scream context-less numbers at significant yet unexpected times, is fairly enjoyable,if that wasn't already obvious.