Question

Como faço essa fração?
(6/7-9/14).(15/21+12/7)

Answer 1

$(\frac{6}{7}-\frac{9}{14}).(\frac{15}{21}+\frac{12}{7}=\\ \\ \frac{12-9}{14}.\frac{15+36}{21}=\\ \\ \frac{3}{14}.\frac{51}{21}=\frac{153}{294}=\frac{51}{98}$