In Chemistry, Seth recorded the weight of copper tubing as 15.4 grams. The actual weight was 15.8 grams. What is his percent of error, rounded to the nearest percent?

Answer: - 2.6%

Step-by-step explanation:

Percent error is the difference between the measured and known value, and then we divide by the known value, and then multiply by 100%.

Estimated. number = 15.4 grams.

Actual number = 15.8 grams

Percentage error = (Estimated number - Actual number) / Actual number * 100

= (15.4 - 15.8) / 15.8 * 100

= - 0.4/15.8 * 100

= 0.0253 * 100

= 2.53

= - 2.6% approximately