In this example, the relative reference to use the selected cell would be

$\backslash$table$[[N,,,v$:$x,fx,],[4,$A$,$B$,$C$,$D$,$E$],[1,,,,,],[2,,x,15,,],[3,,$y$,16,,],[4,,n,3,,],[5,,,,,],[\backslash$table$[[\frac{6}{7}$