25 g of an organic compound "A" containing carbon, hydrogen and oxygen was analysed using the combustion method. There was an increase in mass of…

$\displaystyle 25$ g of an organic compound "A" containing carbon, hydrogen and oxygen was analysed using the combustion method. There was an increase in mass of $\displaystyle \mathrm{CaCl}_2$ tube and potash tube at the end of the experiment. The amount was found to be $\displaystyle 0.15$ g and $\displaystyle 0.1837$ g , respectively. The percentage of oxygen in compound A is $\displaystyle \_\_\_\_$ %. (Nearest integer) (Given: molar mass in $\displaystyle \mathrm{g} \mathrm{mol}^{-1} \mathrm{H}: 1, \mathrm{C}: 12, \mathrm{O}: 16$ )