1/2 = 1 : 2 = 0.5
-1/8 = -1 : 8 = -0.125
3/4 = 3 : 4 = 0.75
-3/5 = -3 : 5 = -0.6
5/8 = 5 : 8 = 0.625
-7/25 = -7 : 25 = -0.28
16/25 = 16 : 25 = 0.64
-3*15/48 = -159/48 = -159 : 48 = -3.3125
1*8/125 = 133/125 = 133 : 125 = 1.064
-21/28 = -21 : 28 = -0.75
30/75 = 30 : 75 = 0.4
