Since the numbers 5 and 28 share no common positive integer factor, the proper fraction 5/28 is already expressed in simplest form.
Yes
28/10 = 14/5 or 24/5
4/5
2/5
5/7
5/14
4/5
5/7
35/28 = 5/4 = 11/4 (or 1.25 in decimal form).
10/56 = 5/28
28/10 = 24/5
5/4