13-13,2:(3 11/21 - 2 4/15)

Question

13-13,2:(3 11/21 - 2 4/15)

Answer 1

13-13,2:(3 55/105-2 28/105)=13-13,2:1 9/35=13-132/10:44/35=13-132/10*35/44=

=13-21/2=13-10.5=2.5