Ответ:

\(1\frac{18}{25}=\frac{43}{25}\), \(9,12=\frac{228}{25}\), \(7,4=\frac{37}{5}\), \(-6\frac13=-\frac{19}{3}\).

\(\frac{43}{25}-\frac{228}{25}-\frac{37}{5}\cdot\left(-\frac{19}{3}\right)=\frac{592}{15}\).

\(\frac{592}{15}:\frac{16}{3}=\frac{592}{15}\cdot\frac{3}{16}=\frac{37}{5}=7,4\).

Ответ: \(7,4\).