1) 2/4 = 1/2 18/27 = 2/3 4/8 = 1/2 6/15 = 2/5
21/16 = 21/16 10/14 = 5/7 12/21 = 4/7 12/16 = 3/4
3/9 = 1/3 9/12 = 3/4 16/21 = 16/21 18/24 = 3/4
2) 20/16 = 5/4 8/5 = 8/5 12/60 = 1/5 15/131 = 15/131
32/128 =1/4 140/22 = 70/11 7/140 = 1/20 144/12 = 12
35/84 = 5/12 35/15 = 7/3
3) 42/32 = 21/16 36/84 = 3/7 43/98 = 43/98 90/75 = 6/5
27/63 = 3/7 51/85 = 3/5 63/42 = 21/14 17/100 = 17/100
20/36 = 5/9 100/250 = 2/5