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.
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 =