During adiabatic expansion of gas, volume increases by 5%. If $\gamma =\frac{3}{2}$ find the percentage change in pressure

$$\begin{gathered} If volume is increased pressure is decreased \\ \frac{\mathrm{\Delta }p}{p}=n\left(\frac{\mathrm{\Delta }V}{V}\right) \\ \frac{\mathrm{\Delta }P}{P}=\frac{3}{2}\times 5\mathrm{\%} \\ \frac{\mathrm{\Delta P}}{\mathrm{P}}=7.5\mathrm{\%} \\ \mathrm{Decrease} \mathrm{in} \mathrm{pressure} \mathrm{is} 7.5\% \\ \mathrm{Hence} \mathrm{change} \mathrm{in} \mathrm{pressure} \mathrm{is} -7.5\% \end{gathered}$$