Question

which pair of fractions is equivalent to this pair: $\frac{3}{5}$ and $\frac{2}{7}$

A: $\frac{7}{35}$ and $\frac{5}{35}$
B: $\frac{21}{35}$ and $\frac{10}{35}$
C: $\frac{24}{35}$ and $\frac{12}{35}$
D: $\frac{10}{35}$ and $\frac{7}{35}$

Answer 1

$\dfrac{3}{5}=\dfrac{3\cdot7}{5\cdot7}=\dfrac{21}{35}\\\\\dfrac{2}{7}=\dfrac{2\cdot5}{7\cdot5}=\dfrac{10}{35}\\\\Answer:\ \boxed{B.}$