Question

How do you find the percent error of the measurement 11.56 cm?

Answer 1

The absolute error is one half of the last decimal.

Explanation:

So in this case real value may be anywhere between:
`11.555 and 11.564999...` which would all be rounded to `11.56`

We write this as:
`11.56+-0.005`

The percent error would then be:

`0.005/11.56xx100%~~0.04%`