7,8-11,7:6,5 _____________ 1/2+1/3+1/4)*12/13

Question

7,8-11,7:6,5
_____________
1/2+1/3+1/4)*12/13

Answer 1

7,8-1,8
___________________ =
(6/12+4/12+3/12)*12/13

       6
=  __________
      13/12*12/13

=6/1=6