How do you find 25.8% of 4000?

3 Answers
Apr 14, 2018

answer=1032

Explanation:

consider we have to calculate x% of y so the sign of % after x shows that,
x%=x/100
& of represents the multiplication between those two terms, i.e.
x% of y=x/100*y
so, a/c to ques.
25.8%of 4000
=25.8/100*4000=1032

Apr 14, 2018

1032 is the answer

Explanation:

25.8%of 4000

=25.8/100*4000

=1032

Apr 14, 2018

Rather than just pumping out numbers I have demonstrated some tricks for doing some things in your head. Example: xx4-> double and doubled again.

25.8% of 4000 =1032

Explanation:

color(purple)("Initial bit of explaining percentage")

Basically the symbol % means xx1/100 including the multiply 'bit'

So 25.8% ->25.8xx1/100

The mathematical equivalent of the word color(red)("of") in 25.8%color(red)(" of ")4000 is multiply. So we end up with:

color(blue)(25.8color(white)("dd")color(green)(ubrace(%))color(white)("dd")color(red)(ubrace("of"))color(white)("ddd")4000)

color(blue)(25.8 color(white)("d")color(green)(xx1/100)color(white)("d.")color(red)(xx)color(white)("ddd")4000)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
color(purple)("Answering the question")

25.8xx1/100xx4000color(white)("dddd")->color(white)("dddd")25.8xxcancel(4000)^(40)/cancel(100)^1

color(white)("ddddddddddddddddddd")->color(white)("dddd")ubrace(25.8xx10)xx4

color(white)("ddddddddddddddddddd")->color(white)("dddddd")258color(white)("ddd")xx2xx2

color(white)(1)516
ul(color(white)(1)516larr" Add")
1032