It is sheer insanity to have a certain percentage you want to be at before you bulk but then depend on strangers guesses to determine if you had made that percentage.
It would be akin to if NASA decided they were going to send a man to Mars and then let twitter decide how much fuel they needed for the mission.
The number is meaningless in any context. Use the mirror. Once you are at the level of leaness you want, go from there, no matter what that percentage number happens to be.