3/9:6/18 = 5/10:25/5= 4/10:2/5= 8/12:4/6= 8/2:4/6= Tolong dijawab ya

3/9×18/6 = 1/3×3/1 = 1/9
5/10×5/25 = 1/2×1/5 = 1/10
4/10×5/2 = 2/5×5/2 = 10/10 = 1
8/12×6/4 = 2/3×3/2 = 6/6 = 1
8/2×6/4 = 4/1×3/2 = 12/2 = 6