$2\frac{2}{3}\text{h}=\frac{8}{3}\cdot 60\text{min}=\frac{8\cdot {\sout{60}}^{20}\text{min}}{{\sout{3}}^1}=160\text{min}$   

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$4\frac{3}{4}\text{kg}=\frac{19}{4}\cdot 100\text{dag}=\frac{19\cdot {\sout{100}}^{25}\text{dag}}{{\sout{4}}^1}=475\text{dag}$

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$\frac{7}{10}\text{m}=\frac{7}{10}\cdot 100\text{cm}=\frac{7\cdot {\sout{100}}^{10}\text{cm}}{{\sout{10}}^1}=70\text{cm}$

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$\frac{3}{40}\text{km}=\frac{3}{40}\cdot 1000\text{m}=\frac{3\cdot {\sout{1000}}^{25}\text{m}}{{\sout{40}}^1}=75\text{m}$