Question

Simplify: [11/5+4/21 of 42-18/5 ÷28/45] - [7/9-2/3 of 15/4]​

Answer 1

$\left(\frac{\frac{11}{5}+\frac{4}{21.42}-\frac{18}{5}}{\frac{28}{45}}\right)-\left(\frac{7}{9}-\frac{\frac{2}{3.15}}{4}\right)$

$=\frac{\frac{11}{5}+\frac{4}{21.42}-\frac{18}{5}}{\frac{28}{45}}-\left(\frac{7}{9}-\frac{\frac{2}{3.15}}{4}\right)$

$=-\frac{54.59663\dots }{28}-\left(\frac{7}{9}-\frac{\frac{2}{3.15}}{4}\right)$

$=-\frac{54.59663\dots }{28}-\left(\frac{7}{9}-0.15873\dots \right)$

$=-1.94987\dots -\left(\frac{7}{9}-0.15873\dots \right)$

$=-1.94987\dots -0.61904\dots$

$=-2.56892$