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 Description  
 Rational Number:  A number that can be written as a/b where a and b are integers, but b is not equal to 0.

There are many different ways we can classify numbers. In fact, many of the classifications are subsets of other classifications. The following are depictions of how the classifications relate.

 Natural Numbers

 Whole Numbers  Integers  Rationals  Irrationals

 Examples

 1, 2, 3, 4,...

 0, 1, 2, 3, 4,...

 , -3, -2, -1, 0, 1, 2, 3, ...

 -1/4, 6/5, 0.125, -3.272727

 , 2.345678...

 What's new

 

 0

 Opposites of natural numbers

 Fractions, repeating and terminating decimals

 non-terminating decimals

Together the rationals and irrationals form a larger set of numbers called the Real Numbers.