In its simplest form, 1112 cannot be simplified further as it is a composite number with multiple factors. However, if you are referring to expressing 1112 as a product of its prime factors, it can be written as 2^3 x 139. This is the prime factorization of 1112, which breaks it down into its prime components.
If you mean 11/12 then it is in its simplest form
1/4 is in its simplest form.
4/5 is in its simplest form.
4/15 is already in simplest form.4/15 is in its simplest form.
4/5 is the simplest form.
4/S is in its simplest form.
225/4 is in its simplest form.
4/7 is in its simplest form.
31/4 is in its simplest form.
21/4 is in its simplest form.
4/5 is in its simplest form.