## Basic College Mathematics (9th Edition)

Unit for the answer (L) is in numerator; unit being changed (ml) is in denominator so it will divide out. The unit fraction is $\frac{1 L}{1000 ml}$. Multiply 18,000 ml times to the unit fraction 18,000 ml * $\frac{1 L}{1000 ml}$. = 18 L