How do you find %Error
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How do you find %Error

[From: ] [author: ] [Date: 12-01-08] [Hit: ]
5% copper and you assay (test them) and find they are 2.4%,2.4/2.......
Okay, so I have the % composition of copper in the post - 1983 pennies. It is 2.5%. How do I calculate the percent error for each penny?

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>100% = Pure
Assay Percent = Test Percentage

let's just be clear here, I give an example:

If pennies are 2.5% copper and you assay (test them) and find they are 2.4%, what is the % error in analysis:

2.4/2.5 x 100 = 96%
100% pure - 96% = 4% error

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your value minus accepted divided accepted times 100
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