Thanks, Suzanne... yeah, that's what I meant, except that I would
leave out the trailing space before the closing brace...

{ EQ /f (n,4)}

otherwise the space gets included in the fraction.

Suzanne S. Barnhill wrote:
What garfield-n-odie meant to write was an { EQ \f (n,4) } field. For more,
see Word's Help under "Field codes: Eq (Equation) field," specifically the
\f (fraction) switch.