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# What does "Give your numerical values to better than 1% accuracy" mean? watch

1. I have trivial question calculating unit vetcors for some given vectors, and the final sentence is:

Give your numerical values to better than 1% accuracy

Now this comes up from time to time and I've never had a clear explanation as to what is required:

so the surd form to my answer is:

2/sqrt(8) i + 2/sqrt(8) j

but 1% to me means: 0.71i + 0.71j - but *better than* implies to an order of magnitude one less again??

Thanks for any help in advance.

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Updated: October 22, 2015
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