feel free to double check my numbers. i did this while i was at work so there may be some errors. also with the rounding not all instances added to 100% perfectly so take that into consideration and take from these numbers what you will.
all i gather from it is that the percentage differences are so small it literally doesn't matter 3 hatches vs 1 in my opinion. personally, i want to give everyone three regardless of class just to generate more pets. but that's an argument for another post and time lol