You know the Pareto Principle? The 80/20 rule? That 80% of the work gets done by 20% of the people? Or 80% of the money belongs to 20% of the people? And so on?

Well it is 'recursive' inasmuch as it can be applied again to the 20% first recognised.

i.e. if 20% do 80% of the work then 20% of the 20% do 80% of they work THEY do.

And so on.

While I can get my head around recursion generally and can fully comprehend the standard recursive algorithm for calculating factorial - I'm not smart enough to put this one together. It always seems to me I have two parameters rather than just the one - the 'n' we watch in the factorial - and can't figure out how to do it.

Yep, I'm not real bright.

Can anyone do that?