Geodude,
funny point, however:
If there is only you (1 person) and you happen to agree with yourself(

), thats 100% agreement.
If there are 100 people and you are the only one agreing with yourself that is 1% agreement (remember, can't be zero since zero times 100 would be still zero, it has to be greater than zero).
(funny, I also used to be a geologist with math major, now I am a CGA, canadian equivalent of CPA)
Attila