<PRE><B>Question 363187</B>
How many ounces of pure bran flakes must be added to 60 oz of cereal that is 20% bran flakes to produce a mixture that is 40% bran flakes?

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Equation:
bran + bran = bran
0.20*60 + 1.00x = 0.40(60+x)
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Multiply thru by 100 to get:
20*60 + 100x = 40*60 + 40x
60x = 20*60
x = 20 ounces (amt. of pure bran needed in the mixture)
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Cheers,
Stan H.</PRE>