The answer depends on as a fraction of WHAT!
Convert 84 3/8 to fraction Notation
To convert a fraction into a decimal, simply divide its numerator by its denominator. For example to convert 5/8 to a decimal, divide 5 by 8 to get 0.625.
5/8
7/8
8/19
8/1000
8/100 hope this helped.
2ft 6in
0.125 into a fraction = 125/1000 or 1/8
81/8
it would be 8/5