Question

Me ajudem......!!!!!!

Answer 1

$A=\frac23-1.444...=\frac23-\frac{13}{9}=\frac{-7}{9}$
$B=0.7-0.777...=\frac{7}{10}-\frac79=\frac{-7}{90}$
$\frac{A}{B}=\frac{\frac{-7}{9}}{\frac{-7}{90}}=\frac{-7}{9}\times\frac{90}{-7}=\frac{90}{9}=\boxed{10}$