[tex]\begin{gathered} \Rightarrow6\frac{1}{4}=\frac{25}{4}\text{ is the height of the zook}eeper \\ \Rightarrow9\frac{3}{8}=\frac{75}{8}\text{ is the height of the giraffe} \\ \Rightarrow\frac{\frac{75}{8}}{\frac{25}{4}}=\frac{75}{8}\times\frac{4}{25}=\frac{3}{2}=1.5 \\ \text{zookeper is 1.5 higher than the giraffe. } \end{gathered}[/tex]
