It's more important to what a person does because as they say, actions speak louder than words do. A person can think a certain way but not act on it but what a person does reflects what they decide internally and what they wanted to do with that idea externally showing that they are serious with that idea of theirs in their head.
6/8 is greater all you need to do is cross multiply take the 2 x8=16 16 goes over the 2/5 now cross multiply 6x5=30 30 over the 6 now what ever number is bigger over that fraction is greater hope this helps