Usual homework request

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Stupid Math College Student
Usual homework request 2017-05-23 02:10:30 Post No. 319477
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Usual homework request Stupid Math College Student 2017-05-23 02:10:30 Post No. 319477 [Report]

Could anyone help a college student taking basic percentage math with his homework? I'll start with this:

The number of CDs sold in 2010 was 114 million, down from 147 million the previous year. Find the percent decrease.
A.(114 - 147)/147 = -33/147 = -22.4%
B.(114 - 147)/114 = -33/114 = -28.9%
C.114/147 = 77.6
D.147/114 = 1.3%

In case you want to directly help me do it, rather than tediously going back and forth on /wsr/, my discord is Tearling#5498
Pic unrelated

Anonymous 2017-05-23 02:13:46 Post No.319480
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Anonymous 2017-05-23 02:13:46 Post No.319480 [Report]

>>319477
How old are you?

Stupid Math College Student 2017-05-23 02:17:17 Post No.319482
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Stupid Math College Student 2017-05-23 02:17:17 Post No.319482 [Report]

>>319480
18

Anonymous 2017-05-23 02:19:10 Post No.319485
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Anonymous 2017-05-23 02:19:10 Post No.319485 [Report]

>>319482
Do you have any idea how to start this problem?

Stupid Math College Student 2017-05-23 02:21:58 Post No.319486
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Stupid Math College Student 2017-05-23 02:21:58 Post No.319486 [Report]

>>319485
This specific problem, the answer by guess would be A. But I'm not sure how to work it.

Anonymous 2017-05-23 02:25:27 Post No.319490
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Anonymous 2017-05-23 02:25:27 Post No.319490 [Report]

>>319486
Percentages are proportions. Ask yourself this, which year is the question asking you to base the decrease on?

Stupid Math College Student 2017-05-23 02:30:09 Post No.319493
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Stupid Math College Student 2017-05-23 02:30:09 Post No.319493 [Report]

>>319490
2009, 147 perhaps?

Anonymous 2017-05-23 02:30:18 Post No.319494
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Anonymous 2017-05-23 02:30:18 Post No.319494 [Report]

>>319486
It's A, and the answer you provided tells you explicitly how to work it out

(new - original) / original, then it's that number represented as a percentage, negative indicating decrease and positive indicating an increase

Anonymous 2017-05-23 02:31:54 Post No.319497
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Anonymous 2017-05-23 02:31:54 Post No.319497 [Report]

>>319493
Right and then just follow >>319494

Stupid Math College Student 2017-05-23 02:33:04 Post No.319499
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Stupid Math College Student 2017-05-23 02:33:04 Post No.319499 [Report]

>>319494
Ah, makes sense. Thanks for the help.

Stupid Math College Student 2017-05-23 02:36:25 Post No.319503
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Stupid Math College Student 2017-05-23 02:36:25 Post No.319503 [Report]

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Any advice on this one?

Anonymous 2017-05-23 03:08:09 Post No.319517
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Anonymous 2017-05-23 03:08:09 Post No.319517 [Report]

>>319503
d, you don't know the scale

Anonymous 2017-05-23 03:17:10 Post No.319523
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Anonymous 2017-05-23 03:17:10 Post No.319523 [Report]

>>319503
>>319517
sorry, it'd be B. Not sure why they put that provision in one of the answers instead of the question, but B is the only scenario in which she could be correct

Stupid Math College Student 2017-05-23 03:19:11 Post No.319526
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Stupid Math College Student 2017-05-23 03:19:11 Post No.319526 [Report]

>>319523
Indeed, B was correct. About to complete the assignment. Thanks for the help.

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible. Read more on this topic here - https://archived.moe/talk/thread/1694/

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible.
Read more on this topic here - https://archived.moe/talk/thread/1694/