3. Сравните: \(\frac{9}{15}\), \(\frac{8}{56}\), \(\frac{42}{90}\), \(\frac{33 · 18}{9 · 18}\).

Сократим дроби: \(\frac{9}{15}=\frac{3}{5}\), \(\frac{8}{56}=\frac{1}{7}\), \(\frac{42}{90}=\frac{7}{15}\), \(\frac{33 · 18}{9 · 18}=\frac{33}{9}=\frac{11}{3}\).

Сравним значения: \(\frac{1}{7}<\frac{7}{15}<\frac{3}{5}<\frac{11}{3}\).

Ответ: \(\frac{8}{56}<\frac{42}{90}<\frac{9}{15}<\frac{33 · 18}{9 · 18}\).