Mathematics
6 Online
OpenStudy (anonymous):
you know the thing you do to set up to find the percentage of something ? iu forgot it can someone help me?
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OpenStudy (mariakershaw):
need help @parisjackson
OpenStudy (anonymous):
yes please
OpenStudy (misssmartiez):
Ok, example:
OpenStudy (mariakershaw):
let @MissSmartiez help you since she is on it @parisjackson
OpenStudy (misssmartiez):
You have a 40/61
on your exam, you want to know what percent it is, so
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OpenStudy (misssmartiez):
What do we do? How do you calculate it?
OpenStudy (anonymous):
ill show you the question is
OpenStudy (mariakershaw):
ok
OpenStudy (misssmartiez):
Ok,
OpenStudy (anonymous):
An XBOX 360 regularly sells for $399. It is on sale for 20% off. What is the sale price of the XBOX 360?
A) $78.80
B) $300.00
C) $319.20
D) $391.02
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OpenStudy (misssmartiez):
0.20 x 399.
OpenStudy (mariakershaw):
yea ^
OpenStudy (misssmartiez):
You just construct the percent to a decimal.
20% / 100 = 0.20.
OpenStudy (anonymous):
79.8%
OpenStudy (misssmartiez):
or in other words, 0.2. Now complete the process.
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OpenStudy (mariakershaw):
agree @MissSmartiez
OpenStudy (anonymous):
So, "A"?
OpenStudy (mariakershaw):
yup
OpenStudy (misssmartiez):
It equals 79.80 so yes.
OpenStudy (misssmartiez):
to put it back into a fraction BECAREFUL!
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OpenStudy (anonymous):
Thank you.
OpenStudy (mariakershaw):
welcome @parisjackson
OpenStudy (misssmartiez):
You aren't done yet.
79.8.
move the decimal point over two spaces.
7980%
OpenStudy (misssmartiez):
Though it would be invalid in this term, so just leave it to a decimal.
OpenStudy (anonymous):
Aw, thank you @MissSmartiez
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OpenStudy (mariakershaw):
yup agree with @MissSmartiez