<PRE><B>Question 730546</B>
I already have a 50% mixture. (It contains 7 scoops of A, - and 7 scoops of B.) 
I want to take one scoop of the 50% mixture and and add enough B to it so that it will become 75%B and 25%A. 
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Equation:
Bstuff + Bstuff = Bstuff
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0.50*1scoop + 1*Bscoops = 0.75(1+B)
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50*1 + 100B = 75*1 + 75B
25B = 25*1
B = 1 scoop (Amt of B to be added)
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Cheers,
Stan H.
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