[tex]\it \it \dfrac{p}{10} =\dfrac{2}{3} \ \ \ (1)
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\dfrac{11}{q} =\dfrac{2}{3} \ \ \ \ (2)
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\dfrac{p}{10}\cdot \dfrac{11}{q} =\dfrac{2}{3} \cdot\dfrac{2}{3} \Rightarrow\dfrac{p}{q} \cdot\dfrac{11}{10} = \dfrac{4}{9} \Rightarrow\dfrac{p}{q} = \dfrac{4}{9} \cdot\dfrac{10}{11} \Rightarrow\dfrac{p}{q} =\dfrac{40}{99} =0, (40)[/tex]
