<p>In an experiment to find acceleration due to gravity (g) using simple pendulum, time period of 0.5s&nbsp; is measured from time of 100 oscillation with a watch of 1s&nbsp; &nbsp;resolution. If measured value of length is 10cn&nbsp; known to&nbsp; 1mm accuracy, The accuracy in the determination of g is found to be x%. The value of x is_____</p>