What is decimal notation of 9%?

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Answer 1 · 2018-06-26T20:43:24

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

#9% = 0.09#

Answer 2 · 2018-06-26T21:24:59

#9% = 0.09#

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#