It is: 51/9 = 17/3 simplified
9 over 51 can be simplified as 3 over 17.
It is already simplified and in its lowest terms as -51/70
51 and 40 are coprime so the ratio 51/40 cannot be simplified.
No.
It is: 30/51 = 10/17
51/100 cannot be simplified further.
51/48 = 3/4
9/9 simplified is 1
9/51 = 3/17
3/7
17/30