Question

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?

Answer 1

`~~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`bar6` percent.

I hope I helped!