Make this equation true by rearranging the 26=74

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?

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract

What’s the range cuz i can’t find it?