Ok, normally I don't handle the math, I usually let Basutai handle it. But in regards to Seal of Command Proc chance.
Proc chance per swing = (Proc per minute)x(Weapon speed)
                                       (60 seconds)
So, now that we have the formula...
Proc chance per swing = [b](7)x(3.6)
                                    (60)
Proc chance per swing = 0.42%.
To factor in the new SoC Glyph, simply use the same equation but multiply the proc per minute by 120% first. (It equals 50.4% proc chance with Glyph)
Hope this helps.