Rational or Irrational Number

There are two types of numbers: rational or irrational, or in simpler terms, numbers that make sense (or can be predicted) and numbers that don't (these numbers will never repeat or stop). The definition or a rational number is that this number can be written as two integers in a numerator and denominator of a fraction. These numbers will get a terminating decimal or else you'll find, it's really rather neat, that the numbers will repeat.

Converting fractions to decimals
On a calculator
All you have to do is to divide
The numerator by the denominator
You'll get a terminating decimal
Or else you'll find
It's really rather neat
That the numbers they repeat
3.141592653589 and on and on is a common IRRATIONAL number because the decimal never repeats or terminates. These numbers will drive you irrational or crazy.

There are two kinds of fears: rational and irrational- or, in simpler terms, fears that make sense and fears that don't. For instance, the Baudelaire orphans have a fear of Count Olaf, which makes perfect sense, because he is an evil man who wants to destroy them. But if they were afraid of lemon meringue pie, this would be an irrational fear, because lemon meringue pie is delicious and would never hurt a soul. Being afraid of a monster under the bed is perfectly rational, because there may in fact be a monster under your bed at any time, ready to eat you all up, but a fear of realtors is an irrational fear. Realtors, as I'm sure you know, are people who assist in the buying and selling of houses. Besides occasionally wearing an ugly yellow coat, the worst a realtor can do to you is show you a house that you find ugly, so it is completely irrational to be terrified of them. --Lemony Snicket