The correct answer is: D. $\frac{{{\text{Standard hours for actual production}}}}{{{\text{Budgeted standard hours}}}} \times 100$
The capacity ratio is a measure of how well a company is using its available resources. It is calculated by dividing the standard hours for actual production by the budgeted standard hours. A capacity ratio of 100% indicates that the company is using its resources at full capacity. A capacity ratio of less than 100% indicates that the company is not using its resources at full capacity.
Option A is the number of actual working days in a period divided by the number of working days in the budget period. This is not a measure of capacity utilization.
Option B is the actual hours worked divided by the budgeted hours. This is a measure of labor efficiency.
Option C is the standard hours for actual production divided by the actual hours worked. This is a measure of labor productivity.
Option D is the standard hours for actual production divided by the budgeted standard hours. This is the correct measure of capacity utilization.