## Basic College Mathematics (9th Edition)

$\frac{1}{400}$
A percent can be written as a fraction with 100 as the denominator. 0.25%=$\frac{0.25}{100}$ =$\frac{0.25\times100}{100\times100}$=$\frac{25}{10000}$=$\frac{25\div25}{10000\div25}$=$\frac{1}{400}$