The number is a rational number
Here, we want to identify if the given number is rational or irrational
While a rational number can be expresed in the form a/b, irrational number cannot be expressed as such
The given number can be expressed as such and hence it is a rational number
The fractional form is;
[tex]6.415418\text{ = }\frac{6415418}{1000000}[/tex]