1) 1/15
2) 5/12
3) 128/35
4) 1/10
5) 5/7
5/9*3/25 = 1/15
14/24*5/7 = 10/24
7/8*16/35 = 14/35
4/15*3/8 = 1/10
15/14*2/3 = 10/2 = 5
