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Mathematics 18 Online
OpenStudy (anonymous):

In a recent election,175,000 people voted. This represents 70% of those eligible to vote. How many people in this community were eligible to vote in the election?

OpenStudy (anonymous):

First we have to find out people are in each % of the community, then we can find out how many people are in 30% of the community. Do you have any idea how to do that?

OpenStudy (anonymous):

How many are in each % of the community.

OpenStudy (anonymous):

I have no idea.

OpenStudy (anonymous):

So you want to split the 175,000 into 70 different parts. Each part is equal to 1%.

OpenStudy (anonymous):

Do you know how to split a number into separate parts?

OpenStudy (anonymous):

no can u explanin it?

OpenStudy (anonymous):

For example, if I had a pie and wanted to make it into 8 slices, what would I do?

OpenStudy (anonymous):

If you had a pie and you wanted to slice it into 8 pieces, you would divide the 1 pi by 8 correct? Hence giving 8 different 1/8 pieces.

OpenStudy (anonymous):

So in contrast, if you want to find 1%, but you have 70%, you would divide the entire thing by 70 to get to that 1%.

OpenStudy (anonymous):

And now that you have 1%, you should be able to do something that will put you back at 30%.

OpenStudy (anonymous):

Does this make sense?

OpenStudy (anonymous):

sorta

OpenStudy (anonymous):

Do you know the formula to find a percentage?

OpenStudy (anonymous):

If you want to find a percentage, for example, how much 80 is of 100, then I would 80/100 = .8 = 80%. With your problem, you are working backwords.

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

So now we have 275,000 equalling 70% of the whole. So first we find what each percentage is, or divide 275,000 by 70, then we multiply that number (which is 1%) by 30, to get the total for 30%. But we are not done. What do we do next?

OpenStudy (anonymous):

You can do it in one shot \[ \frac{175000}{70}100=250000 \]

OpenStudy (anonymous):

Ok that's SOOO much easier!!!

OpenStudy (anonymous):

yw

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