Question

a "terça parte " de dois sétimos ,( resolução )

Answer 1

$\dfrac{1}{3}\text{ de }\dfrac{2}{7}\\ \\ \\ =\dfrac{1}{3}\times\dfrac{2}{7}\\ \\ =\dfrac{1\times 2}{3 \times 7}\\ \\ =\dfrac{2}{21}\\ \\ \\ \boxed{\dfrac{1}{3}\text{ de }\dfrac{2}{7}=\dfrac{2}{21}}$