21/34. 21 and 34 have no common factors (21=3x7, 34=2x17) so it's impossible to reduce it any further.
21/34
No because 34/42 = 17/21 in its lowest terms
34 / 30 = 17 / 15 in its simplest form.
34/68 = 1/2
34/32 = 17/16
34 over 42 in simplest form = 17/21
21/34
21/34
No because 34/42 = 17/21 in its lowest terms
34/57 is in its simplest form.
5/34 is already in its simplest form
34 over 59
13/34
34 / 30 = 17 / 15 in its simplest form.
32/34 = 16/17
34/68 = 1/2
34/32 = 17/16