OK but what is percentage range for a keyword???keyword density is the percentage of keywords (words that people use when searching for you bussiness) in relation to the total number of words on your page.
I use that as well and it works like a charm. as for the SEO tip. Don't do SEO if you're not really sure how it works. Trust me, it's a lot more complicated than spamming keyworks and placing links all over the interwebs.Jessical nailed it.
Here is a tool for you to checkout your kw density tools.seobook.com/general/keyword-density