Question

4) what should be added to-5/7 to get -2/3​

Answer 1

$\frac{-5}{7} + x = \frac{-2}{3} \\\\LCM = 21\\\\\frac{-5}{7} * \frac{3}{3} + x = \frac{-2}{3} * \frac{7}{7} \\\\\frac{-15}{21} + x = \frac{-14}{21} \\\\x= \frac{-14}{21} + \frac{15}{21} \\\\x = \frac{1}{21} \\\\therefore\ \frac{1}{21} \ should \ be \ added \ to \ \frac{-5}{7} \ to\ get \ \frac{-2}{3} \\\\hope\ it\ helps\ !!$