Question

(UNIFOR-CE) Efetuando 7/9x37/21:9/8+1/4, obtém-se

pra ajudar na visualização: $\frac{7}{9} . \frac{27}{21}: \frac{9}{8}+ \frac{1}{4}$

Answer 1

$Resolu\c{c}\~ao \to \left\{\begin{array}{ccc} {\frac{\frac{7}{9}*\frac{27}{21}}{\frac{9}{8}+\frac{1}{4}}=}\\\\ \frac{\frac{1}{1}*\frac{3}{3}}{\frac{9+2}{8}} = \\\\\frac{1}{\frac{11}{8}} = \\\\1*\frac{8}{11} = \\\\ \frac{8}{11}\end{array}\right$

Espero ter ajudado. =^.^=