Yes
1/18 is in its simplest form.
35/18 is in its simplest form.
18/29 is in its simplest form.
18/54 = 1/3 in its simplest form
It is 3/5
15/36 = 5/12
15/20 can be reduced to 3/4
Yes
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