Answer
$-12\lt-7$
Work Step by Step
We know that $-7\gt-12$, because -7 is to the right of -12 on the number line.
That being said, we can also say that $-12\lt-7$, because -12 is to the left of -7 on the number line (which means that -12 has a value that is less than that of -7).