Determine point and the location of point on the number line if point Cis of the distance from point D to point A. Show all your work. Label point on the number line. PHOTO ABOVE

HELPPP

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?