8/32 + 16/32 = 1/4 + 2/4 = 3/4
You don't as first part is 11/16 in its simplest form and second is 3/4 in its simplest form. Add 1/16 to the first part.
11 over 16 (11/16) is already in simplest form.
13/16 is the simplest form.
9/16 is in its simplest form
16/25 is in its simplest form.
9/16 is in its simplest form.
279/16 is in its simplest form.
16/105 is in its simplest form.
31/16 is in its simplest form.
16/27 is in its simplest form.
15/16 is in its simplest form.
15/16 is in its simplest form.