You need a formatting switch on the field -
http://www.gmayor.com/formatting_word_fields.htm
In simplistic terms
Press ALT+F9. This will change the display from <<Fieldname>> to {Mergefield
Fieldname}
add the switch inside the brackets eg {Mergefield Fieldname \# ",0.00"}
Press F9 to update and Alt+F9 to re-display the fields.

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Graham Mayor - Word MVP
My web site www.gmayor.com
Word MVP web site http://word.mvps.org
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> I have an Excel 2007 spreadsheet and am trying to merge with a Word
> 2007 document. The merge is easy EXCEPT that my numbers that are
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> anyone have a solution that is fairly easy to understand?
> Thank you!