While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from $0.25 \mathrm{~g}$ of the compound neutralized $2.5 \mathrm{~mL}$ of $2 \,\mathrm{M} \,\mathrm{H}_{2} \mathrm{SO}_{4}$. The percentage of nitrogen present in organic compound is ______________.