Б) n:5 2/3=1 7/9:1 7/27

[latex]n:5 \frac{2}{3}=1\frac{7}{9}:1\frac{7}{27}\\\\n:\frac{17}{3}=\frac{16}{9}:\frac{34}{27} \\\\n \cdot \frac{3}{17}= \frac{16}{9} \cdot \frac{27}{34}\\\\n=\frac{16\cdot 27}{9\cdot 34}:\frac{3}{17}\\\\n= \frac{16\cdot 27\cdot 17}{9\cdot 34\cdot 3}\\\\n=\frac{(2\cdot 8)\cdot (3\cdot 9)\cdot 17}{9\cdot (2\cdot 17)\cdot 3}= \frac{2\cdot 8}{2}=8[/latex]