[tex]\it a)\ \ \dfrac{2}{17}=\dfrac{10}{85}\\ \\ \\ b)\ \ \dfrac{21}{22}=\dfrac{42}{44}=\dfrac{63}{66}=\dfrac{84}{88}\\ \\ \\ c)\ \ \dfrac{50}{13}\\ \\ \\ d)\ \ \dfrac{3}{11}=\dfrac{12}{44}=\dfrac{15}{55}=\dfrac{18}{66}=\dfrac{21}{77}=\dfrac{24}{88}=\dfrac{27}{99}[/tex]
