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Mathematics 7 Online
OpenStudy (anonymous):

Sally estimated that her call would take minutes but it actually took minutes. What was her percent of error?

OpenStudy (anonymous):

You're missing the #'s

OpenStudy (anonymous):

12 minutes . and 10 *

OpenStudy (anonymous):

Firsrtly, find the error. So, the difference between her guess and the actual answer. Secondly, find the percentage. In this case, 12-10=2. So the error is 2. You will use the error divided by the actual answer x100 to find the percent error.

OpenStudy (anonymous):

so 2 times 100 ?

OpenStudy (anonymous):

which is 200 ?

OpenStudy (anonymous):

No no, firstly, take the error and divide it by the actual answer -then- multiply by 100. So, (2/10)=.2 and then .2 x 100

OpenStudy (anonymous):

so 20 percent ? thanks !

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