There were 400 ducks in a pond and 15 percent of them just left. How many ducks are remaining?  Choices:
A) 300 B) 280 C) 220 D) 340 E) 250
400/100= 
<gadget id="calculator">400/100</gadget>
<output>4</output>
4   4 x 15= 60   400 - 60= 
<gadget id="calculator">400 - 60</gadget>
<output>340</output>
340   Answer is 340
<result>D</result>
There were 400 ducks in a pond and 15 percent of them just left. How many ducks are remaining?