A company has 100 employees. 60% of the employees drive to work. Of the employees who don't drive to work, half take public transportation.  How many employees use public transportation to get to work?
Drive to work:100(.60)=60.
Don't Drive to work:100-60=
<gadget id="calculator">100-60</gadget>
<output>40</output>
40.
Public Transportation:40(.50)=
<gadget id="calculator">40*.50</gadget>
<output>20</output>
20 employees.

<result>20</result>