student estimated a mass to be 250 g but, upon carefully measuring it, found the value to be 240 g. What is the percent error of the estimated mass if the measured value is the accepted one?
A. 4.2%
B. -4.2%
C. -4.0%
D. 4.0%

Question

student estimated a mass to be 250 g but, upon carefully measuring it, found the value to be 240 g. What is the percent error of the estimated mass if the measured value is the accepted one?
  A. 4.2% 	
  B. -4.2% 	
  C. -4.0% 	
  D. 4.0%

anonymous · Answer

im unsure how to do this.

anonymous · Answer

$\sf \Large percent\ error= \frac{|accepted-measured|}{accepted} \times 100% $