We are fairly new to the website scene and we have heard of the terms keyword density trying to find the right balance of keywords on a particular page. Does anyone know what percentage it should be?

I am not sure what the real answer is because I am not sure that anyone knows that works outside of Google however I heard in the low single digits.

That was my understanding as well

I think the best advice to you is too make sure your content looks natural and if it does I would not worry about keyword density if you use small business 100 times on your home page that would not sound natural but maybe 5 would. I think as most things use your common sense.