7) \(18 - 5\frac{19}{100} = \)

\(18 - 5\frac{19}{100} = 17 + \frac{100}{100} - 5\frac{19}{100} = (17 - 5) + (\frac{100}{100} - \frac{19}{100}) = 12 + \frac{81}{100} = 12\frac{81}{100}\)

Ответ: \(12\frac{81}{100}\)