As you've found, it's not exactly a snap to format data in a query's datasheet output. Sounds like you might be a spreadsheet jockey hoping to make this query output more "presentable" - and I'm not trying to make light of that, it's just that queries extract data and do calculations - they're just not designed to be "presentation-worthy". The only straightforward way to do this, depending on where the output is really going, is to use a form or a report, both of which support all the usual formatting options.
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"For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled." - Richard P. Feynman