A 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?

Question

A 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. 4.0% 	
  C. -4.2% 	
  D. -4.0%

D?

Scott · Answer

the estimated mass is to high (positive error) the amount is 10/240 ... A

quick help needed · Answer

Thank you soo much :D