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Question:

A recipe calls for 3 cups of wheat and white flour combined. If 3/8 of this is wheat flour, how many cups of white flour are needed?

A 1(7/8)
Explaination

If 3/8 is wheat flour, then 1 - 3/8 or 5/8 is white flour. So 3 * 5/8 = 15/8 = 1(7/8) cups of white flour are needed.