The average cost for a gallon of gasoline increased from $2.56 one year to $3.18 the next year. What is the percent of increase, rounded to the nearest whole number?
The change from
To find percent of change, use the formula:
If the answer is negative, the change was a decrease. If the answer is positive, the change is an increase.
In this case, we obtain
Rounding to the nearest whole number and since this result is positive, the percent of change is an increase of