78/61 cannot be simplified further.
It is already simplified.
No because: 60/105 = 4/7 simplified
No.
105/112 = 15/16
No.
78/91 = 6/7
It is: 78/96 = 13/16 simplified
5 over 21.
Yes.
45/105 simplifies to 3/7.
33/81 simplified is 11/27........ 49/105 simplified is 7/15!!!!!!!!!!!!