Найди значение выражения: 12 1/4-(8+4 3/8)*(3 2/9-2 5/11)

$12\frac{1}{4}-(8+4\frac{3}{8})\cdot(3\frac{2}{9}-2\frac{5}{11})=2\frac{3}{4}$

1) $8+4\frac{3}{8}=8+\frac{35}{8}=\frac{64+35}{8}=\frac{99}{8}=12\frac{3}{8}$

2) $3\frac{2}{9}-2\frac{5}{11}=\frac{29}{9}-\frac{27}{11}=\frac{319-243}{99}=\frac{76}{99}$

3) $12\frac{3}{8}\cdot\frac{76}{99}=\frac{99}{8}\cdot\frac{76}{99}=\frac{76}{8}=\frac{19}{2}= 9\frac{1}{2}$

4) $12\frac{1}{4}-9\frac{1}{2}=\frac{49}{4}-\frac{19}{2}=\frac{49-38}{4}=\frac{11}{4}=2\frac{3}{4}$