25% assuming you don’t count the car with 18 mpg fuel efficiency.
if you add the amount of cars up that have less than 18 mpg and then divide it by the total number (12) you will get a decimal (0.25) to find the percent multiply the decimal by 100
There are three students. The student in front has 2 students behind them, the student in the back has 2 students in front of them, and there is a student in the middle.