Question

Simplify:$\left(-\frac{2}{7}\times \frac{7}{5}\right)+\left(\frac{9}{5}\times \frac{-10}{9}\right)-\left(\frac{3}{25}\times \frac{100}{5}\right)$

Answer 1

$(\frac{-2}{7}\times \frac{7}{5})+(\frac{9}{5}\times \frac{-10}{9})-(\frac{3}{25}\times \frac{100}{5})$

$=(\frac{-2}{1}\times \frac{1}{5})+(\frac{1}{1}\times \frac{-2}{1})-(\frac{3}{1}\times \frac{4}{5})$

$=\frac{-2}{5}+\frac{-2}{1}-\frac{12}{5}$

$=-2-\frac{2}{5}-\frac{12}{5}$

$=-2-(\frac{2}{5}+\frac{12}{5})$

$=-2-\frac{14}{5}$

$=-2-2\frac{4}{5}$

$=-4\frac{4}{5}$