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1 1/2: (5,5*2 2/11 - 3 2/3) = 3/2:(55/10*24/11-11/3)=3/2:(1320/110-11/3)= 3/2:(3960/330-1210/330)=3/2:2750/330=3/2*330/2750=495/2750=99/550