Question

calcule: (-0,15).(-7/5)​

Answer 1

$- 0.15 = - \frac{15}{100}$

Assim:

$- 0.15 \times - \frac{7}{5} = - \frac{15}{100} \times ( - \frac{7}{5} ) = \\ \\ = \frac{ - 15 \times ( - 7)}{100 \times 5} = \frac{105}{500} = \frac{21}{100} = 0.21$