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**Percent Uncertainty Problem -NEED URGENT HELP!**

## Homework Statement

The question is: What, approximately, is the percent uncertainty for the measurement given as 1.57 m^2.

## Homework Equations

I know the formula that this textbook: 6th edition: Physics - Giancoli gave. It is simply, the ratio of the uncertainty to the measured value, multiplied by 100.

## The Attempt at a Solution

I have tried numerous attempts and for some reason, I couldn't seem to come up with the right answer the book gives in the back. I'm really not sure what other way to do it.

I tried, simply to put:

(.01)/1.57 * 100 = .64%

(.01)/(1.57^2) * 100 = .41%

(1.58-1.57)/1.57 *100 = .64%

...the correct answer in the back of the book is 1%. I kept using .01 because the measured value they gave me 1.57m^2. I am not sure whether I messed up there, I was hoping someone could help me. Thanks

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