The price of a technology stock has dropped to $9.60 today. Yesterday's price was $9.67. Find the percentage decrease. Round your answer to the nearest tenth of a percent. Please help. please get it right I am trying to get done with math. :)

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.