15: (3 12/17 + 2 12/17) + (4,2 - 2 2/5) :4 =? Срочно!!!

Question

15: (3 12/17 + 2 12/17) + (4,2 - 2 2/5) :4 =?
Срочно!!!

Answer 1

15: (3 12/17 + 2 12/17) + (4,2 - 2 2/5) :4 =

15 : (24/17) + (1 4/5) : 4 = 15 * 17/24 =85/8

9/5 : 4 = 9/20

10 5/8 + 9/20 = 11 13/40