They are identical
the four fifths is better
No.
No.
Four fifths is less.
two fifths is less than four sixths
2 and four fifths is less than three, 2 and six fifths is greater than 3.
No.
No.
No.
Yes.
Assuming that "fiths" is your attempt to spell fifths, the answer is yes, 4/5 is greater.
4/5 is greater.