Question

Проверочная работа! Помогите!
(-11/15 - 7/20):(-3 целых 1/4) =

Answer 1

$( - \frac{11}{15} - \frac{7}{20} ) \div ( - 3 \frac{1}{4} ) \\ \\ - \frac{44 + 21}{60 } = - \frac{65}{60} \\ \\ - \frac{13}{12} \\ \\ - \frac{13}{12} \div ( - \frac{3}{4} ) \\ \\ \frac{13}{12} \times \frac{4}{3} \\ \\ \frac{13}{3} \times \frac{1}{3} \\ \\ \frac{13 \times 1}{3 \times 3} \\ \\ \frac{13}{9}$