4/117*18=4/117* 18/1=4*18 / 117*1=72/117
5/16*8/15= 5*8 / 16*15=1*1 / 2*3= 1/6
3/22*2 4/9=3/22*22/9= 3*22 / 22*9= 1*1 / 1*3= 1/3
4/29 : 1/58= 4*58 / 29*1 = 4*2 / 1*1 =8/1=8
6:18/19= 6*19 / 1*18= 1*19 / 1*3= 19/3 6 1/3
5 2/3 : 17/18= 17/3:17/18= 17*18 / 3/17 = 1*6 / 1*1 = 6/1 6
