Repeat 100 times (or 5 or 10, or whatever is needed): "The Logarithm is the Exponent."
Read the given equation in words: log base 12 of 1/144 is -2
The base is clearly 12 (the words say so); and "The Logarithm is the Exponent". The words say the log is -2, so part of the exponential equation (base, raised to a power) is
Then, to make an equation, the missing number, 1/144, must be the answer: