# 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?

Sep 26, 2017

~~4.1 bar6%

#### Explanation:

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$\overline{6}$ percent.

I hope I helped!