excel - Identify pattern in words -

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i have question believe quite simple, don't know proper way it.

basically, program able identify words pattern in it, , if so, extract what's before pattern.

the pattern be, in case /f, @ end of word, , extract what's before.

for example, if program finds 21/f, identify match , extract 21. if word 21/fudge, wouldn't anything.

do know way match @ specific position in word?

i do:

if str "*/f"     before=left(str, len(str)-len("/f")) else     'no match! end if

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