<PRE><B>Question 549394</B>
	--------percent	----------------	quantity									
Iodine	15	----------------			40	oz						
Iodine	100	----------------			x	oz						
Mixture	20	----------------	40	+	x	oz						
												
15*40+100x=20(40+x)
600+100x=800+20x				
100x-20x=800-600				
80x=200									
/	80											
x	=	2.5										
2.5	oz		of			Iodine				
</PRE>