(-2 5/9+1 20/21): 1 8/49-1 7/9: (-6)= (5 5/9-6.8): (2 13/30-2 1/12)*3.6=

вычислить

(-2 5/9+1 20/21):1 8/49-1 7/9:(-6)=
(-23/9 +41/21)·49/57 + 16/(9·6)=(-23·7/63+41·3/63)·49/57 + 8/27=(-161+123)/63·49/57 + 8/27= -38/63·49/57 + 8/27= -2/9·7/3 + 8/27= -6/27= -2/9

(5 5/9-6.8):(2 13/30-2 1/12)*3.6=(50/9-34/5):(73/30-25/12)*(36/10)=
=(250-306)/45 : (146-125)/60 *(36/10)= -(56/45)·(60/21)·(18/5)= -64/5= -12,8