12(13/18) + 16(11/27) – 10(5/9) = _________?

A. 18^2/3
B. 18^31/54
C. 18
D. 20^1/2

Explanation:

12 + 16 – 10 = 18

and 13/18 + 11/27 – 5/9 = (39 + 22 – 30)/(9 * 2 * 3) = 31/54 The answer is 18 (31/54)