Explicație pas cu pas:
[tex]a = 1,(1) + 2,(2) = \frac{11 - 1}{9} + \frac{22 - 2}{9} = \frac{10 + 20}{9} = \frac{30}{9} = \frac{10}{3}\\[/tex]
[tex]b = 5,(5) = \frac{55 - 5}{9} = \frac{50}{9} \\ [/tex]
[tex] \frac{a}{b} = \frac{ \frac{10}{3} }{ \frac{50}{9} } = \frac{10}{3} \times \frac{9}{50} = \bf \frac{3}{5} \\ [/tex]
