To convert the decimal 0.1213 into a fraction, we can recognize that it has four decimal places.
- Write the decimal as a fraction over 1:
\[ \frac{0.1213}{1} \]
- Multiply the numerator and the denominator by 10,000 (since there are four decimal places):
\[ \frac{0.1213 \times 10,000}{1 \times 10,000} = \frac{1213}{10,000} \]
So, the decimal 0.1213 can be expressed as the fraction:
\[ \frac{1213}{10,000} \]
The correct response from the options provided is:
1213 over 10,000.