Question

0,4/0,3-0,7 помогииите

Answer 1

$\frac{0.4}{0.3-0.7} = \frac{0.4}{-0.4} = \frac{4}{-4} =-1 \\ \\ \frac{0.4}{0.3} -0.7= \frac{0.4}{0.3} - \frac{0.21}{0.3} =- \frac{0.19}{0.3} =- \frac{19}{100} : \frac{3}{10} =- \frac{19*10}{100*3} = \\ \\ =- \frac{19}{30}$