Julian and Brittany mailed 275 wedding invitations to families and friends, and predicted that they would attend. Only 265 out of 275 people committed to attending the wedding. Calculate the percent error in their prediction. Round your answer to the nearest hundredth percent.
3.63%
0.038%
-4.00%
3.77%
To calculate the percent error, you need to find the difference between the predicted number of attendees and the actual number of attendees, divide that difference by the predicted number of attendees, and then multiply by 100 to get the percentage.
Predicted number of attendees: 275
Actual number of attendees: 265
Difference: 275 - 265 = 10
Percent error: (10 / 275) * 100 = 3.63%
Therefore, the percent error in their prediction is 3.63%.