I just wanted to interject another two probabilities that may be seen. They are rarer, and not seen very commonly, but I have seen them before. I know Michael Joliff used to be one that used them often, usually when describing babies from Double recessive projects. You may sometimes see 44% or 33%. A 44% comes from breeding a 66% Poss. Het to a 66% Poss. Het. A 33% comes from breeding a 66% Poss Het to a 50% Poss Het. The numbers don't really describe the probability the snake has of being Het or not, but is a mathematical combination of the parent probabilities. However it is a quick way to describe what breeding was done to produce the snake in question. I hope that wasn't too confusing.
I just wanted to describe that in case anyone ever sees those numbers.