A Marshall specimen is prepared for bituminous concrete with a bitumen content of 8% by weight of total maximum. The theoretic and the measured unit weight of the mix are 2.652 gm/cm³ and 2.436 gm/cm3, respectively. The bitumen has a specific gravity of 0.98. The percentage of voids in mineral aggregate filled with bitumen (VFB) is X% (Round off  in the nearest integer).