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Anna has 1 3/8 cup of flour. She has 2 recipes for tortillas. One recipe needs 1 1/4 cup of flour, another recipe needs 1 3/4 cup of flour. Which recipe should she use? Justify your answer.
Anna should use the recipe that needs 1 1/4 cup of flour because she doesn't have enough flour for the recipe that needs 1 3/4 cup. 1 3/8 is less than 1 3/4.