Chapter 4 - Proportions, Percents, and Solving Inequalities - Chapter 4 Review Problem Set - Page 183: 23

$\frac{2}{3}$ = 66.66666667% $\approx$ 66.67%

To change a fraction to a percent, we multiply the fraction by $\frac{100}{100}$, or 100%. $\frac{2}{3}$ $\times$ 100% = $\frac{200}{3}$% = 66.66666667% $\approx$ 66.67% So, $\frac{2}{3}$ = 66.66666667% $\approx$ 66.67%