I can't think of a much simpler form than "18".
Perhaps you meant 1/8? A simple form would be 0.125, but it's debatable whether that is any simpler than 1/8.
18/65 is in its simplest form
18 is already in simplest form.
18/5 is in its simplest form.
18/7 is in its simplest form.
18% = 18/100 = 9/50 in its simplest form
1/18 is in its simplest form.
5/18 is in its simplest form.
35/18 is in its simplest form.
18/49 is in its simplest form.
18/65 is in its simplest form
18/29 is in its simplest form.
18 is already in simplest form.
the simplest form of 18 and 30 is 3-5ths
18/54 = 1/3 in its simplest form
It is: 18/30 = 3/5 in its simplest form
18/37 is already in its simplest form
119/18 is in its simplest form.