## Basic College Mathematics (10th Edition)

$\frac{8.4}{2.8} = \frac{2.1}{0.7}$ We need to find this proportion is True or False. First we need to convert both sides into lowest terms i.e. $\frac{8.4}{2.8} = \frac{8.4\times10}{2.8\times10} = \frac{84}{28} = \frac{84\div28}{28\div28} = \frac{3}{1}$ $\frac{2.1}{0.7} = \frac{2.1\times10}{0.7\times10} = \frac{21}{7} = \frac{21\div7}{7\div7} = \frac{3}{1}$ Now, As $\frac{3}{1} = \frac{3}{1}$, the given proportion is True.