Programmed Math/Decimals

Decimals (or floating point numbers) are the oposite of fractions, where fractions take the form of a number over a number eg: $\frac{1}{2}$ which is one half.

In decimal format this would be 0.5. Why?

Well one half of 1 is 0.5 since 0.5 * 2 is equal to 1. If we multiply the number at the bottom by the decimal we should get the number at the top. Such as:

$\frac{2}{4}$ Is still one half. $2/4=0.5$ since $\frac{1}{2}=\frac{2}{4}$ and $0.5*4=2$

So the formulae could be: $\frac{a}{b}=x$ and thus $x*b=a$