Evaluate the expression: (11.8 72 - 11.8 52) / (-18 + 6 / 3 * -3)

The numerator is $11.8 \times 7^2 - 11.8 \times 5^2$.
Factor out 11.8:

$$11.8 \times (7^2 - 5^2)$$

Calculate the squares:

$$7^2 = 49$$ $$5^2 = 25$$

Substitute these values back into the expression:

$$11.8 \times (49 - 25)$$ $$11.8 \times 24$$

To multiply $11.8 \times 24$:

$$11.8 \times 24 = (10 + 1.8) \times 24 = 10 \times 24 + 1.8 \times 24$$ $$= 240 + 43.2$$ $$= 283.2$$

So, the numerator is 283.2.

The denominator is $-18 + 6 \div 3 \times -3$.
Follow the order of operations (PEMDAS/BODMAS):
First, division:

$$6 \div 3 = 2$$

Substitute this back:

$$-18 + 2 \times -3$$

Next, multiplication:

$$2 \times -3 = -6$$

Substitute this back:

$$-18 + (-6)$$ $$-18 - 6 = -24$$

So, the denominator is $-24$.

$$\frac{283.2}{-24}$$

Divide 283.2 by 24:

$$283.2 \div 24 = 11.8$$

Since the denominator is negative, the result is negative:

$$\frac{283.2}{-24} = -11.8$$

The evaluated expression is $-11.8$.