Question

During the Thanksgiving weekend, the price of a gallon of gas went up from $1.95 to $2.25. Your parents say that is a 30% increase. You tell them you have been studying math and they are wrong. About what percent did the price of gas go up? A. 13%B. 14%C. 15%D. None of the aboveI would appreciate your help.

Answer 1

C. 15%

Step-by-step explanation:

The percentage of the increase can be calculated using the following equation:

`(V_f-V_i)/(V_i)*100\text{ \%}`

Where Vf is the final price of a gallon of gas and Vi is the initial price of a gallon of gas. So, replacing Vf by $2.25 and Vi by $1.95, we get that the percentage of increase is equal to:

`(2.25-1.95)/(1.95)*100\text{ \% = 15.38\%}`

Therefore, the answer is C. 15%