In 2000, the average cost for a gallon of gasoline was $1.40. in 2007 the average cost for a gallon of gasoline is $2.60. what is the percent of increase rounded tot he nearest whole number

To find the percent increase, one must first find the increase in price. The increase in price is $1.20 ($2.60 - $1.40). To find the percent, one must find how much percent 1.2 is from 1.4. One can do that by dividing. After doing all the math, one gets the answer of approximately 86%