[tex] - 1 \frac{3}{4} \div ( - 5 \frac{1}{4} ) = - \frac{7}{4} \div ( - \frac{21}{4} ) = \frac{7 \times 4}{4 \times 21} = \frac{1}{3} [/tex]

Пошаговое объяснение:

[tex] - 1 \frac{3}{4} \div ( - 5 \frac{1}{4} ) = - \frac{7}{4} \div ( - \frac{21}{4} ) = - \frac{7}{4} \times ( - \frac{4}{21} ) = \frac{1}{3} [/tex]