Question

Mac measured the density of silver three times and calculated the following percent errors. Trial 1: 0.95%; Trial 2: 2.86%; Trial 3: -3.81% Which of Mac’s trials is the most accurate?

Answer 1

I actually wrote this on Yahoo Answers 4-5 Years ago. So here you go!
*=Answer
Trail 1: (10.6.10.6) x 100/10.5 = 0.95%*

This was positive error. Trail 3 shows a negative error of (9.6=10.5) x 100/10.5 = -8.57%