Can 0.43721… be a fraction

Write 17/20 as a decimal and as a percent.

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.

What is x3+3x2−16x−48 divided by x−1?