(8/11 + 3/22) : 5/11 = (16/22 + 3/22) : 5/11 = 19/22 x 11/5 = 19/10 = 1 9/10.
17/36 : ( 7/12 - 5/9) = 17/36 : ( 21/36 - 20/36) = 17/36 : 1/36 = 17/36 x 36/1 = 17.
19/24 : ( 3/16 + 5/24) = 18/24 : ( 9/48 + 10/48) = 18/24 : 19/48 = 18/24 x 48/19 = 36/19 = 1 17/19.