Answer :

To find what percent of 315 is 126, you can follow these steps:

1. Identify the Total and Part Values:
- The total value is 315.
- The part value is 126.

2. Set Up the Percentage Formula:
The formula to find the percentage of a part compared to a whole is:
[tex]\[
\text{Percentage} = \left(\frac{\text{Part}}{\text{Total}}\right) \times 100
\][/tex]

3. Plug in the Values:
Substitute the given values into the formula:
[tex]\[
\text{Percentage} = \left(\frac{126}{315}\right) \times 100
\][/tex]

4. Calculate the Result:
- First, divide 126 by 315 to get a decimal.
- Then, multiply the result by 100 to convert it into a percentage.

After performing these calculations, you will find that 126 is 40% of 315.