Rational number: Any number that can be made by dividing one integer by another. The word comes from "ratio". Real number:Positive or negative, large or small, whole numbers or decimal numbers are all Real Numbers. They are not imaginary.
What is the speed limit? It is hard enough going the speed limit now you have to figure it out too? What if you solve it wrong? All the people who never took algebra would be getting a lot of tickets. The answer is 45 mph.