A student estimated a mass to be 250g, but upon carefully measuring it, found the actual mass to be 240g. What is the percent error?

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Answer 1 · 2017-09-26T04:08:30

$~~4.1 bar6%$

To find the percent error, we use this formula:
$P_%=|(e-t)/t|*100$ , where $P_%$ is the percent error, $e$ is the experimental or calculated value and $t$ is the theoretical or known value.
http://astro.physics.uiowa.edu/ITU/glossary/percent-error-formula/

We have 2 known values, so plug them in to get
$P_%=|(250-240)/240|*100$

$P_%=|10/240|*100$

$P_%=|1/24|*100$

$P_%=100/24$

$P_%~~4.1bar6$ , therefore the percentage error is roughly 4.1 $bar6$ percent.

I hope I helped!