EDIT: I understand now, the numerator on the first term is ascending odds and the denominator is ascending evens. Thanks for everyone's help!
So for instance, the 3/5/7 is just the (2n+1) value.
The other looks like the sum of the product of (2n-1)/(2n) for values 1 to n.
You are left with this (in the 4th line):
1 3 5 1
- - - -
2 4 6 7
The pattern I see is that, starting from the top left and reading numerator, denominator, numerator, denominator and so on gives: 1 2 3 4 5 6 7 if you ignore the last numerator.
I may have it wrong, but that looks like the pattern.
i think we're saying the same thing i misunderstood your comment. 1357/2468 is the first fraction of the NEXT line that isnt in the image
And I'm sorry if it looks like 13 over 24. It's supposed to look like 1/2 times 3/4. (The next term adds 5/6, and so on.)
equivalently you just list odds on the numerator and evens in the denominator