# Chapter 4 - Proportions, Percents, and Solving Inequalities - Chapter 4 Review Problem Set - Page 183: 21

$\frac{4}{5}$ = 80%

#### Work Step by Step

To change a fraction to a percent, we multiply the fraction by $\frac{100}{100}$, or 100%. $\frac{4}{5}$ $\times$ 100% = $\frac{400}{5}$% = 80% So, $\frac{4}{5}$ = 80%

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