## Algebra: A Combined Approach (4th Edition)

$\frac{5}{20}$
In the denominator, since 4 * 5 = 20, we multiply the fraction 1/4 by 1 in the form of 5/5. $\frac{1}{4}$ = $\frac{1}{4}$ * $\frac{5}{5}$ = $\frac{1 * 5}{4 * 5}$ = $\frac{5}{20}$