There are 60 passengers on a bus. Children make up 25% of the bus riders. How many adults are on the bus?
The number of children on the bus is 60 passengers * 25% = 
<gadget id="calculator">60*25*.01</gadget>
<output>15</output>
15 passengers.
The number of adults on the bus is 60 passengers - 15 passengers = 
<gadget id="calculator">60-15</gadget>
<output>45</output>
45 passengers.

<result>45</result>