# 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?

##### 1 Answer

Sep 26, 2017

#### Answer:

#### Explanation:

To find the percent error, we use this formula:

http://astro.physics.uiowa.edu/ITU/glossary/percent-error-formula/

We have 2 known values, so plug them in to get

I hope I helped!