Question

Answer 1

\(r:\dfrac{3}{7}=\dfrac{5}{9}\)

\(r=\dfrac{5}{9}.\dfrac{3}{7}\)

\(\Rightarrow r=\dfrac{5}{21}\)

Answer 2

27/35

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Answer 3

\(r=\dfrac{5}{9}\cdot\dfrac{3}{7}=\dfrac{15}{63}=\dfrac{5}{21}\)

Answer 4

Giải:

\(r:\dfrac{3}{7}=\dfrac{5}{9}\)

\(r=\dfrac{5}{9}.\dfrac{3}{7}\)

Vậy \(r=\dfrac{5}{21}\)

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