During determination of the bulk specific gravity of compacted bituminous specimen, the mass in air of the specimen is $1260 \mathrm{g}$ and volume is $525 \mathrm{~cm}^{3}$. The density of water is $1.0 \mathrm{~g} / \mathrm{cm}^{3}$. The theoretical maximum specific gravity of mix is $2.510$.
The percentage air voids in the compacted specimen is $\_\_\_\_\_$ (rounded off to $2$ decimal places).
