% of time to see the flop

[SrGuapo]

Hi, I recently started playing poker and have read SSH and ITH. Let's take the preplop recommendations in SSH.
SSH understandably recommends pretty tight play pre-flop. To play poker correctly as I understand it, the percent of hands where I see the flop will be quite small. If I follow SSH's recommendations for loose games precisely, what percent of the time should I be seeing the flop? I could calculate this, but curious if someone has already done it.