3 x (4 1/9 - 2 7/12 ) = 3 x (4 4/36 - 2 21/36) = 3 x (3 40/36 - 2 21/36) = 3 x 1 19/36 = 3 x 55/36 = 165/36 = 4 21/36 = 4 7/12
