Last month, a 750 g box of cereal was sold at a grocery store for $2.90. However, this month, the cereal manufacturer launched the same cereal in a 580 g box, which is being sold at $2.50. What is the percent change in the unit price?
290 / 750 = 0.38667 cents per gram
250 / 580 =0.4310 cents per gram
0.4310 / 0.38667 =1.1147 - 1 x 100 =11.47% increase in unit price.
