Question

uma fração equivalente a quatro sétimos cujo o denominador seja 28

Answer 1

$\dfrac{4}{7} = \dfrac{x}{28} \to~~~~multiplique~~cruzado:\\\\ 7x=112\to~~x= \dfrac{112}{7} \to~~ x=16\\\\\\ \dfrac{4}{7} = \dfrac{16}{28}\\\\ A~fra{\c c}\~ao~~equivalente~~e\´~~\dfrac{16}{28}$

Answer 2

4/7 x 4 = 16/28
4x4=16
7x4=28
R=16/28