ANSWER:

To calculate the labor-force participation rate, use the formula:

$\text{Labor-Force Participation Rate} = \left( \frac{\text{Labor Force}}{\text{Adult Population}} \right) \times 100$

First, we need to determine the labor force, which is the sum of the number of employed and the number of unemployed:

$\text{Labor Force} = \text{Number of Employed} + \text{Number of Unemployed}$

$\text{Labor Force} = 135.3 \text{ million} + 9.4 \text{ million} = 144.7 \text{ million}$

Now, calculate the labor-force participation rate:

$\text{Labor-Force Participation Rate} = \left( \frac{144.7 \text{ million}}{222.7 \text{ million}} \right) \times 100$

$\text{Labor-Force Participation Rate} \approx \left( 0.649 \right) \times 100 = 64.9\%$

Rounding to the nearest whole number, the labor-force participation rate is:

d. 65 percent