Решите пожалуйста по действиям срочно

$1) 5 \frac{9}{11}:1 \frac{2}{9}= \frac{64}{11}: \frac{11}{9}= \frac{64*9}{11*11}= \frac{576}{121}$
$2)7 \frac{2}{3}*1 \frac{1}{23}= \frac{23}{3}* \frac{24}{23}=8$
$3) \frac{576}{121}-8= \frac{576-8*121}{121}= \frac{576-968}{121}= -\frac{392}{121}$
$4) \frac{11}{54}- \frac{5}{36}= \frac{11*2-5*3}{108}= \frac{7}{108}$
$5)- \frac{392}{121}: \frac{7}{108}=- \frac{392*108}{121*7}= -\frac{56*108}{121}=-9 \frac{119}{121}$