without my calculator or CR3 -
(yes it is always in my flightbag together with MP3 and calculator)
I use the third rule.
Runway Track is 0 degrees
Wind from 0 to 30 deg left or right take 1/3 as crosswind.
Wind from 30 to 60 deg (30 to 60 deg) take 2/3 as crosswind
Wind from 60 to 90 deg take 3/3 or the full as crosswind.
Works and does not distract me ...
Too complicated to calculate in % or 1/6ths or 4 segments ...
