Yes, \(0.37815\) is a rational number. A rational number is any number that can be expressed as the quotient or fraction \(\frac{p}{q}\), where \(p\) is an integer and \(q\) is a non-zero integer.
In this case, \(0.37815\) can be expressed as the fraction \(\frac{37815}{100000}\), since moving the decimal point five places to the right converts it into an integer. Therefore, since it can be represented as a fraction of two integers, it qualifies as a rational number.