1). 4/9:2 = 4\9*1\2 = 2\9
6:3/5 = 6*5\3 = 10
2). 2*(14/15:2/3) = 2 4\5
14\15*3\2 = 7\5
2*7\5 = 14\5 = 2 4\5
3)11/12:3/4*11/24 = 11\12*4\3*11\24 = 121\216
4)1/2*2/3*3/4*4/5 = 1\5
5)(1/12-1/13):(1/13-1/14)*(1/14-1/15):(1/15-1/16) = 1 3\13
1. 1\12-1\13 = 1\156
2. 1\13-1\14 = 1\168
3. 1\156*168\1 = 168\156 = 14\13
4. 1\14-1\15 = 1\210
5. 14\13*1\210 = 2\390
6 1\15-1\16=-1\240
7 2\390*240\1 = 16\13 = 1 3\13