Укажите пару неравных дробей.

• \(\frac{20}{140}\) и \(\frac{13}{130}\)
• \(\frac{3}{21}\) и \(\frac{50}{350}\)
• \(\frac{11}{77}\) и \(\frac{9}{63}\)
• \(\frac{4}{28}\) и \(\frac{70}{490}\)