Question

which fraction is equivalent to $\frac{21}{28}$

A: $\frac{18}{36}$
B: $\frac{12}{18}$
C: $\frac{3}{4}$
D: $\frac{1}{3}$

Answer 1

$\dfrac{21}{28}=\dfrac{21:7}{28:7}=\dfrac{3}{4}\to\boxed{C}$