## Thinking Mathematically (6th Edition)

$0.0084=\dfrac{21}{2,500}$
Multiply $\frac{10000}{10000}$ by the given decimal. Then, reduce the fraction. $=0.0084 \times \dfrac{10000}{10000} \\=\dfrac{84}{10,000} \\=\dfrac{42}{5,000} \\=\dfrac{21}{2500}$