## Dividing Decimals

When dividing decimals, it may be possible to change the calculation so that it involves dividing whole numbers.
To evaluate
$\frac{20.4}{0.05}$
multiply numerator and denominator by 100 to obtain
$\frac{20.4}{0.05} \times \frac{100}{100}= \frac{2040}{5}$
.
Now carry own the calculation using normal long division, obtaining the result 408.