Talk:BFB 12/@comment-24927622-20180701142033/@comment-24927622-20180702025949

Of the 4,500 cockroach species, only 30 are pests, and only 4 of those 30 are really damaging.

This means that only 1 in every 1,125 cockroach species is damaging, and only 1 in every 150 cockroach species is a pest.

please appreciate them :(