It is already simplified.
No because: 60/105 = 4/7 simplified
150 over 6 simplified = 25/1
No.
78/105 = 26/35
105/112 = 15/16
No.
5 over 21.
45/105 simplifies to 3/7.
33/81 simplified is 11/27........ 49/105 simplified is 7/15!!!!!!!!!!!!
Yes, 150/100 can be simplified down to 3/2.
105/58