Question 145341
<font color="red">ratio</font>nal number: any number that <b>can</b> be expressed a <font color="red">ratio</font> (ie fraction) of 2 whole numbers. Examples of rational numbers are {{{2/3}}}, {{{2}}}, {{{1/2}}}, etc.



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irrational number: any number that <b>cannot</b> be expressed as a fraction of two whole numbers. Examples of irrational numbers are {{{sqrt(2)/3}}} ( the {{{sqrt(2)}}} cannot be expressed as a fraction of two whole numbers), {{{sqrt(11)}}}, etc.