1. The problem is to find the missing numerator in the fraction \( \frac{\_}{2} \) such that \( 4 - 8 = \frac{\_}{2} \). 2. First, calculate the left side: \(4 - 8 = -4\). 3. We need to find \(x\) such that \( \frac{x}{2} = -4 \). 4. Multiply both sides by 2 to solve for \(x\): $$ x = -4 \times 2 $$ $$ x = -8 $$ 5. Therefore, the missing numerator is \(-8\).