Question

What is the diffrence between -25 and -12

Answer 1

The difference is -13.

Calculate the difference between the two negative values
After you know the negative values you're comparing, you can calculate the difference. Do this by subtracting one negative value from the other. For example, you'd subtract -7 from -5 to get -2.
So (-25) - (-12) = -13

Answer 2

theyre both negative so you add them, -37