It is: 3/4 in its simplest form
9 is an integer and not a fraction.
If you mean 9/12 then it is 3/4 in its simplest form
0.072 as a fraction in simplest form is 9/125.
The simplest form of 1.8 as fraction is 9/5
9/14 is in its simplest form.
0.9 = 9/10 as a fraction in its simplest form
-0.45 as a fraction in its simplest form is -9/20
It is 26/9 as an improper fraction in its simplest form
9/16 is the simplest form.
x.xxx is already a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction in its simplest form. Its equivalent, in simplest rational form, is 9/5.
9/7 is in its simplest form.
9/8 is in its simplest form.