It can't be one. Proper fractions are less than one.
The absolute value of 12.7 is greater than 1. It is, therefore, an improper or top-heavy fraction. Such a fraction cannot be expressed as a proper fraction.
12
127/1
It is simply 127/1 as an improper fraction
127 is an integer, and as a decimal number, it is 127.
127/100
It is simply: 127/1
0.127= 127/100 in fraction
12.7 = 127/10 in fraction
225/127
127/1000
127/500
127/400
0.0315