Final answer:
The decimal 0.18 is not equal to 0.525 or 1/8.
Step-by-step explanation:
To find the decimal or fraction that is not equal to 0.525 or 1/8, we can compare each option individually.
0.18 is not equal to either 0.525 or 1/8.
So, the decimal 0.18 is the answer to this question.