Respuesta :

[tex] \dfrac{2}{7} + \dfrac{1}{6} = \dfrac{2 \times 6}{7 \times 6} + \dfrac{1 \times 7}{6 \times 7} = \dfrac{12}{42} + \dfrac{7}{42} = \dfrac{19}{42} [/tex]

[tex]\boxed {\boxed {\text {Answer: They ate }\dfrac{19}{42} \text { of the pasta.}}}[/tex]
19/42 is the answer !