Error=observed-accepted? right? science!?

Question

when figuring out percentage error, is error=observed-accepted, where the observed is the value recieved, and the accepted the "right" value, right?

i need to find % error in an experiment where i got 2.9 but the right answer is 2.7. what do i do?

Answer 1

percent error = ABS[ (A-E)/A ]x 100

ABS = absolute value

A=accepted value (I.e. handbook)

E=experimental (the value you get)

percent error = ABS [(2.7 - 2.9) / 2.7] x 100 = 7.4 percent