You're nearly there. Try this:

{ IF 100 - ff1 = 0 "" { = 100 - ff1 } }


--
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
Word MVP FAQ site: http://word.mvps.org
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"zSplash" zNOSPAMSplash@ gci.net wrote in message
...
I am trying to do a formula in a table in Word. (What's the deal with MS
not using classical logic, as in VB -- it's so easy there, but so
difficult
in Word/Excel!!!?)

Here's what I tried, unsuccessfully, where ff1 is a bookmark representing
the value of a form field within a table:
=IF((100-ff1=0) "" (100-ff1))

I have tried various machinations of this, to no avail. Please help me,
someone.....

TIA