45 is an integer and so cannot be simplified.
32/45 is in its simplest form.
43/45 is in its simplest form.
17/45 is in its simplest form.
8/45 is in its simplest form
The GCF of 42 and 45 is 3. 42/3 = 14 45/3 = 15 42/45 = 14/15
8/45 is already in simplest form.
16/45 is already in its simplest form
43/45 is already in its simplest form
45/72 is 5/8 in simplest form.
32/45 is already in its simplest form
64/45 is in its simplest form.
45 and 28 have no common factor. In other words, you can't simplify that.