In the Marshall method of mix design, the coarse aggregates, fine aggregates, filler, and bitumen having respective specific gravities of 2.60, 2.65, 2.70, & 1.02, are mixed in the ratio of 54.36, 33.20, 4.84 & 7.60 percent, respectively. If the measured bulk specific gravity of bitumen mix is 2.28, the percentage voids filled with bitumen (VFB) (in percentage) is ______

(Answer correct up to 2 decimal place)