Which of the following statements correctly compares the fractions $\dfrac{51}{64}$ and $\dfrac{3}{4}$?

$\dfrac{51}{64} > \dfrac{3}{4}$

$\dfrac{51}{64} < \dfrac{3}{4}$

$\dfrac{51}{64} = \dfrac{3}{4}$

The relationship cannot be determined.

Which of the following statements correctly compares the fractions $\dfrac{23}{36}$ and $\dfrac{2}{3}$?

$\dfrac{23}{36} > \dfrac{2}{3}$

$\dfrac{23}{36} < \dfrac{2}{3}$

$\dfrac{23}{36} = \dfrac{2}{3}$

The relationship cannot be determined.