What is the relative error of an observation taken by an infrared sensor which predicts the distance of an object to be 4cm but the actual value is 3.8cm?

What is the relative error of an observation taken by an infrared sensor which predicts the distance of an object to be 4cm but the actual value is 3.8cm? Correct Answer 0.0526

GiveActual Value=3.8cm Measured Value=4cm Absolute error=Measured Value-Actual Value Absolute error=4cm-3.8cm=>0.2cm Relative error=Absolute error/Actual value Relative error=0.2/3.8cm=>0.0526
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