(240 : (-8) + (-12)(-4) - 28) : 5;

Let's break down the expression step by step.

The expression is: \[ (240 : (-8) + (-12)(-4) - 28) : 5 \]

1. Solve \(240 : (-8)\): \[ 240 \div (-8) = -30 \]

2. Solve \((-12)(-4)\): \[ -12 \times -4 = 48 \]

3. Now, substitute these results back into the expression: \[ (-30) + 48 - 28 \]

4. Calculate \(-30 + 48\): \[ -30 + 48 = 18 \]

5. Now, calculate \(18 - 28\): \[ 18 - 28 = -10 \]

6. Finally, substitute back into the original expression: \[ (-10) : 5 \]

7. Calculate \(-10 : 5\): \[ -10 \div 5 = -2 \]

Therefore, the final result is: \[ \boxed{-2} \]