What fraction has denominator 12 and is equivalent to $\dfrac{2}{3}$?

The correct answer is $\dfrac{8}{12}$

The denominator is the number on the bottom of the fraction.

It is currently 3, so we need to multiply it by 4.
But we must also multiply the numerator (the top number) by 4 at the same time.

∴ $\dfrac{2}{3}$ = $\dfrac{2 \times 4 }{3 \times 4}$ = $\dfrac{8}{12}$