Guild Wars 2

Hello!
I’ve an answer about sigils.
Does the Superior sigil of Accuracy, the one with +5% critical chance, give 5% of the player’s critical chance or add 5% critical chance to the one the player has?
For example: we suppose i have 60 critical chance. Will I, with sigil of accuracy, have 65% (65+5) critical chance or 63% (60+(60/100*5)) critical chance? Thank you for the help, Massimo

it should be 65%