Si A viaja,

c es 2/3×4/5=8/15 de a.

a representa 1÷(1+4/5+8/15)= 3/7.

c representa 3/7×8/15=8/35 del total.

a vale:

(1/3-8/35)×(3/7-1/3)= 30 yuanes.

b vale:

44-30=12