tolong dengan caranya

1.60-40=20
60:40=3:2
2.30+45 = 75
30:45 = 2:3
3.75-40 = 35
75:40 = 15:8
4.40+32 = 72
40:32 = 5:4
5.72-24 = 48
72:24 = 3:1
Semoga membantu