## Basic College Mathematics (10th Edition)

Use ratios and cross multiplication to find the number of nickels. Ratios must use the same units of measure, so note that 1kg=1000g. $\frac{1\ nickel}{5g}=\frac{x\ nickels}{1000g}$ $(5)(x)=(1)(1000)$ $5x\div5=1000\div5$ $x=200$