Problems from Multiplication of fractions

Development:

1. ${\displaystyle \frac{5}{9}}\cdot {\displaystyle \frac{-4}{8}}={\displaystyle \frac{5}{9}}\cdot {\displaystyle \frac{-1}{2}}={\displaystyle \frac{5\cdot (-1)}{9\cdot 2}}={\displaystyle \frac{-5}{18}}$
2. ${\displaystyle \frac{-3}{7}}\cdot {\displaystyle \frac{-1}{10}}={\displaystyle \frac{-3\cdot (-1)}{7\cdot 10}}={\displaystyle \frac{3}{70}}$

Solution:

1. ${\displaystyle \frac{-5}{18}}$
2. ${\displaystyle \frac{3}{70}}$

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