On a number where would 4/3 go?
Would it go one third the way between 3 and 4?
Where would 5/3 go?
4/3 and 5/3 are more than 1 (which is 3/3) and less than 2 (which is 6/3).
4/3 is 1/3 of the way from 1 to 2.
5/3 is 2/3 of the way from 1 to 2.