1/2 = ?/8
4 (1/2 = 4/8)
6/8
3/4 (divide by 2)
3/4 = 9/?
12 (3/4 = 9/12)
10/15
2/3 (divide by 5)
2/5 = ?/20
8 (2/5 = 8/20)
12/18
2/3 (divide by 6)
5/6 = 25/?
30 (5/6 = 25/30)
7/8 = 21/?
24 (7/8 = 21/24)
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