All numerator is a series of prime number

And denominator is a series of all odd numbers

So answer is **13/9**

And series will be 3 5/3 7/5 11/7 13/9 17/11

+1 vote

...

For first its 3/1 and 1 is not a prime number

so for a/b

a is all series of prime number

and b is all odd numbers