(1 2/3+2 4/9):(4 26/27-2 2/9)

1) 1 2/3 + 2 4/9 = 1 6/9 + 2 4/9 = 3 10/9 = 4 1/9 2) 4 26/27 - 2 2/9 = 4 26/27 - 2 6/27 = 2 20/27 3) 4 1/9 : 2 20/27 = 37/9 * 27/74 = 3/2 = 1 1/2 = 1,5