## Basic College Mathematics (10th Edition)

Use ratio and cross multiplication to find the number of nickels. Remember that the ratios must use the same unit of measure. 1kg is 1000g. $\frac{1\ nickel}{5\ g}=\frac{x\ nickels}{1000g}$ $5x=(1)(1000)$ $5x\div5=1000\div5$ $x=200$