A 12-pack box of soda cans has dimensions 4.875 inches by 5.125 inches by 15.5 inches. A single can of soda is approximately a cylinder with a diameter of 2.5 inches and a height of 4.875 inches. What percent of the full box volume is not taken up by the cans, and thus 'wasted space'?
Show your calculations, including units as appropriate.