Answer:
5.26%
Explanation:
To calculate percent error, use the following formula:
( (absolute value of (measured value - actual value) ) / actual value ) * 100
1 KG = 1000 g
( (absolute value of (950 - 1000) ) / 950 ) * 100 = 5.26%
It would make sense that the percent error is relatively low because the mass of the stone the student selected is only 50g away from 1 KG.