Question 845000
3.25%	Whole milk or Regular Milk
about 2%	=2% or Reduced fat 
about 1%	=1% or Low fat 
0.0 – 0.5%	=Skim milk or nofat
http://en.wikipedia.org/wiki/Fat_content_of_milk
Where did you get 4.5 % butterfat milk? Normal is 3.25%
Low fat milk is 1%
reduced is 2%

.015a+.045b=.025*100,
a+b=100
a= 66 2/3 b=33 1/3