Răspuns :
[tex] \frac{a}{b} = \frac{2,7}{5,4} = \frac{ \frac{27}{10} }{ \frac{54}{10} } = \frac{27}{54} = \frac{1}{2} [/tex]
[tex] \frac{a}{b} = \frac{ \frac{1}{9} }{ \frac{5}{3} } = \frac{1}{9} : \frac{5}{3}= \frac{1}{9} x \frac{3}{5} = \frac{1}{15} [/tex]
[tex] \frac{a}{b} = \frac{ \frac{1}{9} }{ \frac{5}{3} } = \frac{1}{9} : \frac{5}{3}= \frac{1}{9} x \frac{3}{5} = \frac{1}{15} [/tex]