Răspuns :
[tex]\it \dfrac{11}{12}:1\dfrac{7}{15}=\dfrac{11}{12}:\dfrac{22}{15}=\dfrac{11}{12}\cdot\dfrac{15}{22}=\dfrac{\ 165^{(3}}{264}=\dfrac{\ 55^{(11}}{88}=\dfrac{5}{8}[/tex]
[tex]\it \dfrac{11}{12}:1\dfrac{7}{15}=\dfrac{11}{12}:\dfrac{22}{15}=\dfrac{11}{12}\cdot\dfrac{15}{22}=\dfrac{\ 165^{(3}}{264}=\dfrac{\ 55^{(11}}{88}=\dfrac{5}{8}[/tex]