Well... for starters:
[tex]
\frac{5}{2}=5\times\frac{1}{2} \\
\frac{5}{2}=\frac{5}{1}\times\frac{1}{2}
[/tex]
And the rule is [tex]\frac{a}{b}\times\frac{c}{d}=\frac{a\times c}{b\times d}[/tex]
Therefore:
[tex]\frac{5}{2}=\frac{5\times1}{1\times2}\Longrightarrow\boxed{\frac{5}{2}=\frac{5}{2}}[/tex]
