[tex]\bf \textit{volume of a cube}\\\\
V=s^3\qquad
\begin{cases}
s=\textit{length of a side}\\
---------\\
s=s+0.25s\\
\qquad 1.25s\\
\qquad \frac{5}{4}s
\end{cases}\implies V=\left( \frac{5}{4}s \right)^3\implies V=\cfrac{5^3}{4^3}s^3
\\\\\\
V=\cfrac{125}{64}s^3
\\\\\\
\textit{notice, the new volume is }\frac{125}{64}\textit{ larger than the original volume }s^3[/tex]
