5,3:2,4-1 1\2
________
0,702:1,3 - 0,415

3,7
__
11,1

5 3/10 : 2 4/10 - 1 1/2 = 53/10 : 24/10 - 3/2 = 53/10 х 10/24 - 3/2 = 53/24 - 3/2 = 53/24 - 36/24 = (53-36)/24 = 17/24 (~ 0.71)