Retention rate $=$

Number of employees who remain employed for the entire measurement period $100$

Number of employees at the start of the measurement period

For example, the retention rate equals, eighty divided by $100,$ multiplied by $100.$ The retention rate is $80$ percent.

Retention rate $=$

$\frac{80}{100}100=80$ percent $(80\%)$

Company CBE has $360$ remaining employees. At the start of the second quarter, the company had $400$ employees. What is the retention rate?

$\mathrm{.}09\%$

$9\%$

$90\%$

$10\%$