Transformam :
[tex]0,4=\frac{40}{100} = \frac{2}{5}\\\\2,5 = \frac{25}{100}=\frac{1}{4}[/tex]
Calculam :
[tex]\frac{2}{5} + \frac{5}{4} * \frac{7}{3} - \frac{7}{12} : \frac{1}{4} = \\\\=\frac{2}{5} + \frac{35}{12} - \frac{7}{12} *4 \\\\=\frac{2}{5} + \frac{35}{12} - \frac{7}{3} \\\\=\frac{^{12/}2}{5} + \frac{^{5/}35}{12} - \frac{^{20/}7}{3} \\\\=\frac{24}{60} + \frac{175}{60} - \frac{140}{60} \\\\=\frac{24+175-140}{60} \\\\=\frac{59}{60}[/tex]
