Toluene is used as a diluent in lacquer formulas. Its vapor pressure at $30\backslash$deg C is $36\mathrm{.}7$ mm Hg absolute$.$ If the barometer falls from $780$ mm Hg to $740$ mm Hg$,$ will there be any change in the volume of dry air required to evaporate $10$ kg of toluene?

Textbook answer is 'A slight increase of $0\mathrm{.}25\%\text{'}$