Edit: Oh, and use the ROUND([yourField], 2). If you want to round down you can use the floor function, but that would require some parsing. Another option would to use str() to cast it to a string, find the position of the decimal, and drop everything more then 2 char's right of the decimal. Again, that takes some parsing, but you have options.
If this is something you'll need to do often, you may want to consider creating a UDF to use like a function.