The probability that it rains is 0.6. The probability the game is cancelled given that it rains is 0.5. Find the probability that it rains and the game is cancelled.

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?