2) (28 4/5 : 13 5/7 + 6 3/5 : 2/3) / (1 11/16 : 2 1/4)

1. Convert mixed numbers to improper fractions: (144/5 : 96/7 + 33/5 : 2/3) / (27/16 : 9/4).
2. Perform division and addition in the numerator: (144/5 * 7/96 + 33/5 * 3/2) = (21/10 + 99/10) = 120/10 = 12.
3. Perform division in the denominator: 27/16 * 4/9 = 3/4.
4. Perform final division: 12 / (3/4) = 12 * 4/3 = 16.