A recipe requires 3 c of flour to make 27 dinner rolls. How much flour is needed to make 9 rolls?
1 c of flour is needed to make 9 rolls.
Therefore, 1/3 c of flour is needed to make 3 rolls.
Therefore, 1 c of flour is needed to make 27 rolls.
Therefore, (1/3) x 9 = 3/3 = 1 c of flour is needed to make 9 rolls.