Convert Mixed Number: Simplifying 2 31/100 to Decimal Form

To solve the problem of converting the mixed number $2\frac{31}{100}$ into a decimal:

• First, identify the whole number part, which is $2$.
• Second, convert the fractional part $\frac{31}{100}$ into a decimal by dividing the numerator by the denominator: $31 \div 100 = 0.31$.
• Combine the whole number with the decimal part: $2 + 0.31 = 2.31$.

By following these steps, we find the decimal representation is $2.31$.

The correct multiple-choice answer is option 2: $2.31$.