If 18 is 15 percent of 5 percent of a certain number, what is the number?	Pick one.
A) 9
B) 2400
C) 40
D) 81
E) 400
Let the certain number be x.   =&gt; (15/100)*(5/100)*x = 18;   =&gt; x=2400;   Ans is (2400).
<result>B</result>
If 18 is 15 percent of 5 percent of a certain number, what is the number?