Alicia has pencils and markers as showman in the tape diagram alicia has pencils and markers as shown in the tape diagram write the ratio of markers to pencils in three different ways

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?