Guild Wars 2

So i like playing with axe as a weapon, tested something in the mists and axe damage with and without traits felt kinda similar. So i used a steady weapon and it seems like everything states a different number. Tooltip says 20%, wiki says 15% and my numbers were close to 10% (soldier, 30spite, norunes i got 43->47 on AA and 328->360 on ghastly claws)
So what is the correct number and do steady weapons play a role in getting different results from the intended 20% increase?

Ah okay got it, mixed things up with the 20% cdr