To find out what percent 318.2 is of 256, you can use the formula:
\[ \text{Percentage} = \left(\frac{\text{Part}}{\text{Whole}}\right) \times 100 \]
In this case, the "Part" is 318.2 and the "Whole" is 256. Plugging in the numbers:
\[ \text{Percentage} = \left(\frac{318.2}{256}\right) \times 100 \]
Calculating the fraction:
\[ \frac{318.2}{256} \approx 1.2421875 \]
Now, multiplying by 100 to get the percentage:
\[ \text{Percentage} \approx 1.2421875 \times 100 \approx 124.21875 \]
Rounding to the nearest tenth:
\[ \text{Percentage} \approx 124.2 \]
Therefore, 318.2 is approximately 124.2% of 256.