Julian and Britney mail 275 wedding invitations to family and friends and predicted that they would all attend. Only 265 out of 275 people committed to attending the wedding. Calculate the percent error and their prediction. Round your answer to the nearest hundredth percent.
To find the percent error, we subtract the predicted number of attendees from the actual number of attendees, divide by the actual number of attendees, and multiply by 100.
The predicted number of attendees is 275.
The actual number of attendees is 265.
So the percent error is ((275 - 265) / 265) * 100.
Calculating, we get ((10/265) * 100) = 3.77%.
Rounded to the nearest hundredth percent, the percent error is 3.77%.