To convert the decimal $0.125$ to a fraction:

1. Recognize that $0.125$ is the same as $\frac{125}{1000}$ because 0.125 is in the thousandths place.

2. Simplify the fraction by dividing both the numerator and denominator by their greatest common divisor (GCD), which is 125: $\frac{125 \div 125}{1000 \div 125} = \frac{1}{8}$

So, $0.125$ in fraction form is $\frac{1}{8}$.

Would you like a more detailed explanation, or do you have any further questions?

Here are five related questions:

1. How would you convert $0.375$ to a fraction?
2. How do you simplify fractions?
3. Can every decimal be converted into a fraction?
4. What is the fraction form of $0.5$?
5. How do you convert a repeating decimal into a fraction?

Tip: When converting a decimal to a fraction, always place the decimal over a power of 10 (depending on the number of decimal places) and simplify.