Question

a) 4 11/18 * 6/7 - 1 4/9;

Answer 1

 4 $frac{11}{18}$ * $frac{6}{7}$ - 1 $frac{4}{9}$ = 4 * $frac{11}{13}$ * $frac{1}{7}$ - $frac{4}{9}$ = $frac{44}{21}$ - $frac{4}{9}$ = $frac{104}{63}$