16 задание, пожалуйста

$1 \frac{8}{17} \div ( \frac{12}{17} + 2 \frac{7}{11} ) = \frac{25}{17} \div ( \frac{12}{17} + \frac{29}{11} ) = \\ \\ = \frac{25}{17} \div ( \frac{132 + 493}{187} ) = \frac{25}{17} \div ( \frac{625}{187} ) = \\ \\ = \frac{25}{17} \times \frac{187}{625} = \frac{11}{25}$
Готово.
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