(5,8 : 7,2 - 5/9 + 3/8) : (1,323 : 2,1 + 1,245) = 0,625/1,875 = 1/3
1) 5,8 : 7,2 = 58/72 = 29/36
2) 29/36 - 5/9 = 29/36 - 20/36 = 9/36 = 1/4
3) 1/4 + 3/8 = 2/8 + 3/8 = 5/8 = 0,625
4) 1,323 : 2,1 = 0,63
5) 0,63 + 1,245 = 1,875
6) 0,625 : 1,875 = (625/1000) : (1875/1000) = 5/15 = 1/3