It is: 30/117 = 10/39 simplified
12 over 91 can't be simplified.
50/91 is already simplified.
It is: 91/119 = 13/17 simplified
No
65%.
Yes.
No; it is 1/7 simplified.
It is: 117/26 = 9/2 in its lowest terms
Since 91 and 9 don't have any common multiples, 9/91 cannot be simplified.
It is: 91/70 = 13/10 simplified
78/91 = 6/7