Pre-Algebra
7 Online
OpenStudy (anonymous):
16 is what percent of 80
how do i do this???
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OpenStudy (anonymous):
is over of % over 100
OpenStudy (anonymous):
16 / 100
jhonyy9 (jhonyy9):
so
80 is 100%
16 --- x
---------
x = 16*100/80 = ? %
OpenStudy (anonymous):
i thought it was the % * the number?
OpenStudy (anonymous):
ok i got 2 different answers is there any answers to this question @nisa ?
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OpenStudy (anonymous):
yes its a college placement test practice thing it says the answer is 20 %
jhonyy9 (jhonyy9):
so than check it my answer
OpenStudy (anonymous):
that is right thats what i got
OpenStudy (anonymous):
@jhonyy9 yeah you are right :)
OpenStudy (anonymous):
is/of and %/100
16/x 80/100
cross multiply
16 x 100 and 80x X
1600 and 80x
divide
1600/80
=20%
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jhonyy9 (jhonyy9):
so remember ALLWAYS you need using the rule of 3 simple and so will get the right answer easy
OpenStudy (anonymous):
so the first number times a hundred divided by whatever number is given?
jhonyy9 (jhonyy9):
give an different example
jhonyy9 (jhonyy9):
so 25 is how many percent of 100 ?
jhonyy9 (jhonyy9):
how you write it now for you can giving the right answer ?
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OpenStudy (anonymous):
25*100/100?
jhonyy9 (jhonyy9):
100 is 100%
25 is --- x %
-------------
x= 25*100/100 = 25
jhonyy9 (jhonyy9):
or you need a different exemple again ?
OpenStudy (anonymous):
i think i got how to do it :) thanks alot :)
jhonyy9 (jhonyy9):
3 is how many pecent of 9 ?
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OpenStudy (anonymous):
3*100/9
33.33 repeating
OpenStudy (anonymous):
yes
jhonyy9 (jhonyy9):
so this mean that you have learned it sure now
jhonyy9 (jhonyy9):
yes ? this is easy
OpenStudy (anonymous):
yes i have thanks so much :)
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OpenStudy (anonymous):
it seems really easy now
jhonyy9 (jhonyy9):
yw
was my pleasure that i like learning people math
good luck
bye
OpenStudy (anonymous):
good luck to u too i appreciate it :)
byee
OpenStudy (anonymous):
thanks everybody :)
OpenStudy (anonymous):
welcome
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OpenStudy (anonymous):
:)