# Thread: error and percent error

1. ## error and percent error

Ugh, greatest possible error and percent error is not my best friend.

How do I solve these problems...Ive never covered this stuff in school.

2. Originally Posted by LivinLife
Ugh, greatest possible error and percent error is not my best friend.

How do I solve these problems...Ive never covered this stuff in school.
Hi LivinLife,

What problems? I don't see any.

The Greatest Possible Error of a measurement is one half of the unit of measure to which the measure is being rounded.

Example: If you are measuring a length using inches, the greatest possible error would be 1/2 inch. If you measured in meters, the greatest possible error would be 50 cm (1/2 meter).

Per Cent Error = $\displaystyle \frac{\text{Observed value - True Value}}{\text{True Value}} \times 100$

3. Originally Posted by masters
Hi LivinLife,

What problems? I don't see any.

The Greatest Possible Error of a measurement is one half of the unit of measure to which the measure is being rounded.

Example: If you are measuring a length using inches, the greatest possible error would be 1/2 inch. If you measured in meters, the greatest possible error would be 50 cm (1/2 meter).

Per Cent Error = $\displaystyle \frac{\text{Observed value - True Value}}{\text{True Value}} \times 100$

haha sorry...
um the questions im trying to figure out are:

Find the greatest possible error for the measurement 0.991g
Find the percent error for 2cm (round to the nearest hundredth)