Question

Calculeaza: ($\frac{3}{14}$ - $\frac{4}{21}$ + $\frac{5}{28}$ ) × ( -3 $\frac{3}{7}$ )

Answer 1

$( \frac{3}{14} - \frac{4}{21} + \frac{5}{28} )*(-3 \frac{3}{7} )=$
$=( \frac{18}{84} - \frac{16}{84} + \frac{15}{84} )*(- \frac{24}{7} )=$
$\frac{17}{84}*(- \frac{24}{7} )=- \frac{17*2}{7*7} =- \frac{34}{49}$