The nice thing about Man-Maths is that there are no GCSE or A-Level exams in them (or the equivalent in Deutschland, North America, the Netherlands, Australia, etc); therefore, no one can tell you that you're doing it wrong!
In our own way, we each come to our own formula and which ever way we come to it, we can justify it and give ourselves top marks for making the numbers work in our favour

So Trad, CX, CXV, Areo, M3W or Super 3, each owner comes up to 100% in their own personal way... well, at least until a day when they want to change and then the rules of Man-Maths are rewritten to suit the decision for that day!