Naomi3921 Naomi3921 16-01-2023 Mathematics contestada in 2008, the price of a gallon of unleaded gasoline was $4.02. in 1990, it was only $1.37 per gallon. what is the increase expressed as a percent change? round to the nearest percent. a. 66% b. 393% c. 193% d. 134% please i need help' ...?