again, let's change the mixed fractions to improper, and check the proportions for each.
[tex]\bf \stackrel{mixed}{4\frac{1}{2}}\implies \cfrac{4\cdot 2+1}{2}\implies \stackrel{improper}{\cfrac{9}{2}}~\hfill
\stackrel{mixed}{1\frac{1}{3}}\implies \cfrac{1\cdot 3+1}{3}\implies \stackrel{improper}{\cfrac{4}{3}}
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\cfrac{~~\frac{9}{2}~~}{\frac{4}{3}}=\cfrac{9}{6}\implies \cfrac{9}{2}\cdot \cfrac{3}{4}=\cfrac{3}{2}\implies \cfrac{27}{8}\ne \cfrac{3}{2}~~\bigotimes[/tex]
