What is 0.125 as a fraction?

0.125 as a fraction is 1/8.

To convert the decimal 0.125 to a fraction, you start by recognising that 0.125 is the same as 125 thousandths, or 125/1000. The next step is to simplify this fraction by finding the greatest common divisor (GCD) of the numerator (125) and the denominator (1000). The GCD of 125 and 1000 is 125.

When you divide both the numerator and the denominator by their GCD, you get:

\[ \frac{125 \div 125}{1000 \div 125} = \frac{1}{8} \]

So, 0.125 simplifies to 1/8.

Understanding this process is crucial for GCSE Maths as it helps you convert between decimals and fractions, which is a common requirement in many problems. Simplifying fractions is also a key skill, as it makes calculations easier and results more understandable. Remember, the key steps are to express the decimal as a fraction with a power of ten in the denominator, and then simplify by dividing by the GCD.