Ответ:

\(\frac{11-10.2175}{11-7.87}=\frac{0.7825}{3.13}=0.25\).

\(\frac{0.07\cdot0.5+2.746}{1.52+3.89-6.7\cdot0.5}=\frac{0.035+2.746}{5.41-3.35}=\frac{2.781}{2.06}=1.35\).

Тогда \((0.25+1.35):(6.5-7)=1.6:(-0.5)=-3.2\).

Ответ: \(-3{,}2\).