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Mathematics 21 Online
OpenStudy (anonymous):

79 cell phone;20 percent discount?

OpenStudy (mathstudent55):

First, find 20% of $79. Then subtract that form $79.

OpenStudy (anonymous):

15.01?

OpenStudy (anonymous):

is my answer right?

OpenStudy (mathstudent55):

How did you get it?

OpenStudy (anonymous):

20*79=1580and then subtracted by 79

OpenStudy (mathstudent55):

20% = 0.2 0.2 * $79 = $15.80 You more or less go this. The discount is $15.80 Now we do $79 - $15.80

OpenStudy (anonymous):

so I'm right?:)

OpenStudy (mathstudent55):

No. The answer is not $15.01 as you wrote above. The answer is $79 - $15.80 = $63.20

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