7 1/2 : 2 1/2= sama caranya

7 1/2 : 2 1/2 = (7×2+1)/2 : (2×2+1)/2 = 15/2 : 5/2 = 15/2 x 2/5 = 30/10 = 3

15/2 : 5/2
15/2 x 2/5
3/1 x 1/1
3/1
3