What is 1.7 in cups for flour?

1.7 cups of flour is equivalent to approximately 1 cup plus 3 tablespoons. To be precise, there are 16 tablespoons in a cup, so 0.7 of a cup is about 11 tablespoons. Thus, you can measure out 1 cup and then add 3 tablespoons to achieve 1.7 cups of flour.