# How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?

It decreases by a factor of $\frac{1}{3}$.
$V \propto \frac{1}{P}$
Therefore, if the $\textsf{\textcolor{red}{\text{pressure}}}$ sfcolor(red)("increases" by a factor of $3$ (tripled), then at constant temperature, we expect the sfcolor(blue)("volume" to sfcolor(blue)("decrease" by a factor of $\frac{1}{3}$ ("cut in third").