Question

Jan mixes 1 1/3 cups of white flour,, 1 3/4 cups of whole wheat flour, and 2/3 cup of rye flour. About what fraction of the mixture is whole wheat flour? Solve and explain how you got your answer.
white:wheat:rye = 4/3 : 7/4 : 2/3 = 16:21:8
wheat/total = 21/(16+21+8) = 21/45 = 7/15

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