Welcome, Bozhyte!
You have a proportion of broken bonds and a temperature. You even have a formula, which is just Boltzmann's distribution slightly rewritten. What are your thoughts?
Boltzmann's distribution tells that even if an event needs more energy than kT, over a big amount of molecules, this event is observed with some frequency, because heat is a mean energy that fluctuates at microscopic scale.
Keep in mind that the small kT relates with molecules and the big RT with moles.