Question 570639
	percent	----------------	quantity									
Milk	2	----------------			900	pounds						
Butter fat	100	----------------			x	pounds						
Mixture	8	----------------	900	+	x	pounds						
												
sum of individual components = quantity in mixture												
2*900+100x=8(900+x)
1800+100x=7200	+8x				
100x-8x	=5400							
92x=5400									
	x=	5400	/	92								
	x=	58.7										
58.7	pounds	of 	Butter fat	has to be added