15/28 is the simplest form and, by definition, the simplest form must be equivalent to other forms of the ratio.
15/28 is in its simplest form.
15 over 28
30/28 = 15/14
240/448 = 15/28
It is: 30/28 = 15/14
1/28
15/28
15/28
15/28
4/15.
240/448 in simplest form is 15/2815/28