Yasmin claims "If we have two positive rational numbers, the one with the greater denominator is smaller", Justify or contradict by giving examples?

Do the following pair represent the same rational number?

$\frac{-7}{21}$ and $\frac{3}{9}$.

Do the following pair represent the same rational number: $\frac{-16}{20}$ and $\frac{20}{-25}$.

Do the following pair represent the same rational number: $\frac{-2}{-3}$ and $\frac{2}{3}$.

Do the following pair represent the same rational number: $\frac{-3}{5}$ and $\frac{-12}{20}$.

Do the following pair represent the same rational number: $\frac{8}{-5}$ and $\frac{-24}{15}$?