Answer
$-\frac{5}{38}$
Work Step by Step
Using order of operations, first solve numerator and denominator separately, then simplify the fraction.
$\frac{-7(-1) + (-3)4}{(-2)(5) + (-6)(-8)} = \frac{7 - 12}{-10 + 48} = \frac{-5}{38} = -\frac{5}{38}$