Question

12/5 ÷ 9/2 - 1/12 × 18/5

Answer 1

12/5 ÷ 9/2 - 1/2 . 18/5
12/5 . 2/9 - 1/2 . 18/5
24/45 - 18/10
48-162/90
-114/90

Simplificando fica:

19/15