21 over 24
12 over 14. 18 over 21. 24 over 28
14/16, 21/24
12/14, 24/28, 18/21
14/16, 21/24, 28/32
14/24, 21/36, 28/48
They are: 14/16 and 21/24
12/14 18/21 24/28
12/14 24/28 18/21
It's equivalent to all of those except 6/24 . I guess the precise answer to the question is yes, yes, no, yes.
1 over 7 is the equivalent to 3 over 21.
21 over 24 simplified is 7/8.