I have a construction to say a ratio. I think of or and would be the correct prepositions.
So, If I give you my practice case
The ratio of minimum rectangle’s floor area to enclosed circle area is tested with a defined threshold and a candidate, given a low ratio, is taken as natural object assuming that natural object has a more irregular boundary.
The ratio between floor area of enclosed minimum rectangle and enclosed circle area is tested with a defined threshold and a candidate, given a low ratio, is taken as natural object assuming that natural object has a more irregular boundary.
As I cannot figure out the best preposition with the grammatically correct construction, I would like to ask what would be given a grammatically correct sentence?