bear in mind that a reciprocal is just the same thing, upside-down
[tex]\bf \cfrac{2}{3}\implies \stackrel{reciprocal}{\cfrac{3}{2}}~\hfill \cfrac{1}{7}\implies \stackrel{reciprocal}{\cfrac{7}{1}}\implies 7~\hfill 4\implies \cfrac{4}{1}\implies \stackrel{reciprocal}{\cfrac{1}{4}} \\\\\\ ~\hspace{34em}[/tex]
