The first step in simplifying our expression is to simplify what is in the parenthesis.
In parenthesis, we have a negative number but it can be taken out to give
From here we need to add (or subtract, depends on how you want to think of it) the two numbers.
This addition can be visualized on a number line. Imagine starting at -22.75 and then moving 18.3 units to the right, where will we land?
We will land at -4.45.
Hence, our answer is -4.45.