31/2+2 5/8+5 11/12=? write your answer as a mixed number.

3 1/2 = 7/2
2 5/8 = 21/8
5 11/12 = 71/12

7/2 x 6/6 = 42/12

42/12 + 71/12 = 113/12
21/8 x 3/3 = 63/24
113/12 x 2/2 = 226/24

63/24 + 226/24 = 289

289/24 = 12.0416

12  4/100, or simplified  12 1/25 is your answer

hope this helps