Problems from Dividing fractions

Development:

1. ${\displaystyle \frac{6}{7}}:(-{\displaystyle \frac{5}{11}})={\displaystyle \frac{6}{7}}\cdot (-{\displaystyle \frac{11}{5}})={\displaystyle \frac{6\cdot (-11)}{7\cdot 5}}={\displaystyle \frac{-66}{35}}.$
2. ${\displaystyle \frac{-9}{10}}:(-{\displaystyle \frac{2}{5}})={\displaystyle \frac{-9}{10}}\cdot (-{\displaystyle \frac{5}{2}})={\displaystyle \frac{(-9)\cdot (-5)}{10\cdot 2}}={\displaystyle \frac{45}{20}}={\displaystyle \frac{9}{4}}.$

Solution:

1. ${\displaystyle \frac{-66}{35}}$
2. ${\displaystyle \frac{9}{4}}$

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