## Basic College Mathematics (9th Edition)

$\frac{1}{9}$
We can write the given ratio as a fraction and then simplify in lowest terms. Since 1 day has 24 hours, we can write 3 days as $(3\times24)=72$ hours. $\frac{8hours}{72hours}$ Since both the denominator and numerator have the same unit, we can divide out the common unit. $\frac{8}{72}=\frac{8\div8}{72\div8}=\frac{1}{9}$