This question refers to the following chart.The chart above shows the amount of automobile fuel sold in 1 hour at a local gas station. Regular unleaded gas sold for $3.50 per gallon, and diesel fuel sold for $3.45 per gallon. The total sales of all three grades of fuel is $1,612. If each gallon of premium unleaded gas sold for d dollars, what is the percent increase in the cost of gasoline if you decide to purchase premium unleaded instead of regular unleaded?

The California Basic Educational Skills Test (CBEST) is a standardized test administered in the state of California.

CBEST Mathematics test contains 50 multiple-choice questions which require candidates to solve problems from three major areas: Estimation, Measurement, and Statistical Principles; Computation and Problem Solving; and Numerical and Graphic Relationships.