Question

A zookeeper predicted the weight of a new baby elephant to be 275 pounds when it was born. The elephant actually weighed 307 pounds at birth. What was the percent error of the zookeeper's prediction?

Answer 1

`\boxed{10.4 \%}`

Explanation:

`\text{Percent error} = \frac{\lvert\text{Predicted - Actual}\lvert}{\text{Actual}} * 100\%`

Data:

Predicted = 275 lb

Actual = 307 lb

Calculation

`\text{Percent error} = (\lvert275 - 307\lvert)/(307) * 100\%\\\\= (\lvert-32\lvert)/(307) * 100\%\\\\= (32)/(307) * 100\%\\`

= 0.104 × 100 %

= 10.4 %

The percent error of the zookeeper's prediction was
`\boxed{10.4 \%}`.