Question

What is decimal notation of 9%?

Answer 1

`50% = 0.5` (divide percentage by `100`)

`9% = 0.09`

Answer 2

`9% = 0.09`

Explanation:

Link together these two facts:

Fact 1: In percentages the symbol % is a bit like a unit of
`color(white)("ddddd")`measurement.

Fact 2: Using an example: In algebra `2x` means `2xx x`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Using the above we have `9% -> 9xx%`

But the unit of measurement % represents `1/100` so we have:

`9%color(white)("dd") -> color(white)("dd")9xx%color(white)("dd") ->color(white)("dd")9xx1/100=9/100`

But `9/100` has the same value as `0.09`

So `9% = 0.09`