Two compounds $\mathrm{I}$ and $\mathrm{II}$ are eluted by column chromatography (adsorption of $\mathrm{I}>\mathrm{II}$). Which one of the following is a correct statement?

$29.5 \mathrm{mg}$ of an organic compound containing nitrogen, was digested according to Kjeldahl's method and the evolved ammonia was absorbed in $20 \mathrm{mL}$ of $0.1 \mathrm{M}$ $\mathrm{HCl}$ solution. The excess of acid required $15 \mathrm{mL}$ of  $0.1 \mathrm{M} \mathrm{NaOH}$ solution for complete neutralization. The percentage of nitrogen in the compound is: