The problem is base 10 is a terrible base for any unit that needs to be divided. It’s an arbitrary base with no positives based on our fingers. No reasonable species would have picked base 12 when base 12 is so much better and so close. 10 can’t be evenly divided into 3 or 4 parts. 60 minutes in 3 parts is 20 minutes. 100 minutes in 3 parts is 33.3333 minutes