Задача 63

Сравни дроби: $\displaystyle\frac{12}{35}$ и $\displaystyle\frac{72}{211}$;
$\quad\displaystyle\frac{22}{35}$ и $\displaystyle\frac{110}{177}$; $\quad\displaystyle\frac{1998}{1999}$ и $\displaystyle\frac{1999}{2000}$.