This is very convenient in many ways
For example, it's easy to tell which of two numbers is larger
Just compare left-to-right
Much easier than with straight rationals
(Is 100/89 more or less than 244/217?)
(Just compare 1 . 1 2 3 5 9.... and 1 . 1 2 4 4....)
Arithmetic (addition, multiplication, etc.) is fairly easy
We all learned it in grade school