Question

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?
A.) 19%

B.) 24%

C.) 26%

D.) 29%

Answer 1

From 2.56 to 3.18; 3.18-2.56=0.62 increased 
so if 2.56 represented 100%
       0.62 represents     ? %
cross multiply 
?%= 0.62·100/2.56=24.21875 which rounded to the nearest whole is 24%
Answer is B).

Answer 2

Answer: B.) 24%

Step-by-step explanation:

Given : The average cost for a gallon of gasoline increased from $2.56 one year to $3.18 the next year.

Increase in cost ( in dollars) = 3.18-2.56=0.62

The formula to find the percent decrease :-

$\dfrac{\text{Increase in cost}}{\text{Previous cost}}\times100\\\\=\dfrac{0.62}{2.56}\times100\\\\=24.21875\approx24\%\ \ \text{[Rounded to the nearest whole percent.]}$

Hence, the percent of increase = 24%