To find the missing number in the equation \( 24 \div ? = 0.125 \), you can rewrite it as:
\[ ? = \frac{24}{0.125} \]
Now, calculate \( \frac{24}{0.125} \):
\[ 0.125 = \frac{1}{8} \]
Thus,
\[ \frac{24}{0.125} = 24 \times 8 = 192 \]
So, the missing number is 192.
Therefore, \( 24 \div 192 = 0.125 \).