Hmm, I don't know that I made myself clear, so I will go into more detail to make sure we are on the same page.
The users vote for which search engine they used to find site. (Google, Yahoo, Bing)
The votes are stored in database as total votes for EACH search engine (Google=30,Yahoo=23,Bing=13)
Then, I am figuring out the percentage of each search engine used by dividing by total number of votes ($searchEngine/$totalVotes
*100) which of course does not always yield nice results.
This number ($google,$yahoo,$bing) is then rounded. The problem of course is that sometimes the 3 different percentages don't add up to 100%.