An ointment was examined for its zinc oxide content as follows- (a) a 0.7503-g sample of the ointment was combusted to volatilize organic matter, subsequent which the zinc was precipitated as zinc oxalate, filtered, and washed (b) the precipitate was dissolved in acid as well as was titrated with a 0.40136 N permanganate solution, requiring 15.36mL to reach equivalence. Find out the percent zinc oxide in the ointment.