Keyword Density Is A Myth
SEO is a complicated thing but keyword density really doesn't matter much other than the fact that you should use your keyword naturally within the document instead of purposely adding it to get a certain percentage.
If you don't believe me, then check out this link:
http://www.hobo-web.co.uk/seo-blog/i...sity-seo-myth/
There's a list of several quotes from top SEO experts saying the same thing: not to worry about getting a specific percentage of keywords in your article.
There are other factors that affect search engine rankings more, like keyword proximity in the document (title, h1 tags, url, inbound anchor text) among other things.
Tracy S
Morningdove Jewelry - Unique and Fun!
Internet Content Proofreading/Editing