Yes. Their highest common factor is 7, so dividing both parts gives you 3 over 8.
21
No, it can be simplified as: 119/56
In simplest terms, that's 3/8
28 over 56 simplified is 1/2.
39/56 cannot be simplified further.
no
no
21/56 OR 21 -- 56
No, it is already simplified.
21 over 24 simplified is 7/8.
36/56 = 9/14
2/56 = 1/28