That IS the simplest form.
42/75 = 14/25
42/50 = 21/25
1.7857
It is 6/25.
42 and 23/25
It is 42 and 24/25
25/42
Well the answer is 21 over 25
The answer depends on what is wrong with it that you wish to right.
42/121 is in its simplest form.
42.96 = 42 and 24/25