Rational number is whole number that can be represented by a fraction, as:
1/4 - 2.55 - 0.7777... - -5, etc
Irrational number is the the number that can not be represented by a fraction, as:
0.01001000100001...
Rational numbers can be expressed as fractions of integers (e.g., 2 1 ), while irrational numbers cannot be expressed in this way and have non-repeating, non-terminating decimal expansions (e.g., 2 ).
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