\( \frac{15}{8 - 0,4 - 32} = \frac{15}{7,6 - 32} = \frac{15}{-24,4} \)
\( \frac{15}{-24,4} = \frac{150}{-244} = \frac{75}{-122} = -\frac{75}{122} \)
Ответ: -\( \frac{75}{122} \)