Put simply, yes.
To prove, find like denominators, then compare numerators.
Factors of 6: 6, 12, 18, 24, 30, 36
Factors of 8: 8, 16, 24, 32, 40, 48
The LCF is 24.
Now compare numerators.
16 > 6
So yes, 4/6 is greater than 2/8.
Hope this helps. Have a nice day.