A sample of a naturally occurring element, \(\text{X}\), has an average atomic mass of \(28.14 \text{ amu}\). The mass spectrum of \(\text{X}\) reveals that the element consists of exactly three isotopes: \(^{28}\text{X}\) (\(28.00 \text{ amu}\)), \(^{29}\text{X}\) (\(29.00 \text{ amu}\)), and \(^{30}\text{X}\) (\(30.00 \text{ amu}\)). The percent natural abundance of \(^{28}\text{X}\) is determined to be \(90.0\%\). What is the percent natural abundance of \(^{30}\text{X}\)?