To solve this problem, we'll convert the decimal 2.4 into a mixed number:
- Step 1: Identify the integer part and the decimal part of 2.4.
- The integer part is 2, and the decimal part is 0.4.
- Step 2: Convert the decimal 0.4 to a fraction.
- Decimal 0.4 is equivalent to 104 because the digit 4 is in the tenth position.
- Step 3: Combine the integer part with the fraction.
- The mixed number is 2104.
Therefore, when 2.4 is expressed as a mixed number, it is 2104.