Вариант 2 1) 3/2 : 1/4; 2) 1/2 : 1/4; 3) 1/2 : 1/6; 4) 13/14 : 7/39; 5) 2/3 : 2/3; 6) 4/5 : 3/7; 7) 2/7 : 7/9

Вариант 2

1. \( \frac{3}{2} : \frac{1}{4} = \frac{3}{2} \cdot 4 = \frac{3 \cdot 4}{2} = 3 \cdot 2 = 6 \)
2. \( \frac{1}{2} : \frac{1}{4} = \frac{1}{2} \cdot 4 = \frac{4}{2} = 2 \)
3. \( \frac{1}{2} : \frac{1}{6} = \frac{1}{2} \cdot 6 = \frac{6}{2} = 3 \)
4. \( \frac{13}{14} : \frac{7}{39} = \frac{13}{14} \cdot \frac{39}{7} = \frac{13 \cdot 39}{14 \cdot 7} = \frac{507}{98} \)
5. \( \frac{2}{3} : \frac{2}{3} = 1 \)
6. \( \frac{4}{5} : \frac{3}{7} = \frac{4}{5} \cdot \frac{7}{3} = \frac{4 \cdot 7}{5 \cdot 3} = \frac{28}{15} \)
7. \( \frac{2}{7} : \frac{7}{9} = \frac{2}{7} \cdot \frac{9}{7} = \frac{2 \cdot 9}{7 \cdot 7} = \frac{18}{49} \)