Question 701043
by definition, the rational ones are the ones that can be written in the form {{{a/b}}} where and {{{b}}} are integers and {{{b}}} does not equal {{{0}}}

{{{15=15/1}}}-{{{rational}}} number

{{{219=219/1}}}-{{{rational}}} number

{{{sqrt(9)=3=3/1}}}-{{{rational}}} number

{{{3995=3995/1000}}}-{{{rational}}} number

so, { {{{15}}},{{{219}}},{{{sqrt(9)}}},{{{ 3.995}}} }- the set of numbers contain {{{rational}}} numbers