решение примера (3,6-1 1/3):(4 1/5-2 7/9)

(3,6-1 1/3):(4 1/5-2 7/9)=51/321) 3.6-1(1/3)=36/10-4/3=(108-40)/30=68/302) 4(1/5)-2(7/9)=21/5-25/9=(189-125)/45=64/453) 68/30:64/45=(68×45)/(30×64)=(68×3)/(2×64)=(34×3)/64=102/64=51/32