What is 80% of 125?

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Answer 1 · 2016-11-30T13:43:45

#80%" of "125 = 20#

The word 'of' means multiply, as in 2 of 6 #=2xx6" or "6+6#

So 80% of 125 is the same as #80%xx125#

The % sign is a unit of measurement worth #1/100#

So 80% #-> 80/100#

Putting this all together and we have:

#80/100xx125#

But #80/100 =(80-:2)/(100-:2) = 40/50 = 4/5" "# giving:

#4/5xx125 " "=" " 4/(cancel(5)^1) xx cancel(125)^5#

#4xx5=20#

#"So "80%" of "125 = 20#