I hate Monarch High School

I’m stuck on this i don’t understand.

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !