They are: 14/16 and 21/24
1/7 is one of then
There are an infinite number of such fractions. 14/26, 21/39 are two examples.
21 over 30 and 7 over 10
14 over 22 21 over 33
14/16 and 21/24 are two equivalent fractions to 7/8
7/11 = 14/22 = 21/33
5/7, 10/14, 15/21
1/7, 2/14
14/16, 21/24
14/24 and 7/12
8/14 & 12/21