A soil sample weighed $158g$ moist $($fresh from the field$),$ and $110g$ after drying. The

cylinder holding the soil has a diameter of $6\mathrm{.}8cm$ and a height of $10cm.$ Assume

particle density is $2\mathrm{.}65\frac{g}{c}{m}^3.$

Calculate the air$-$filled porosity of this soil, showing the correct units.

Round your answer to the nearest $0\mathrm{.}01(2$ decimal places$).$