Julian and brittany mailed 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 in their prediction. Round your answer to the nearest hundredth percent.
-4.00%
3.77%
0.038%
3.63%
To calculate the percent error, we need to find the difference between the predicted value and the actual value, divide that by the actual value, and then multiply by 100.
Predicted value = 275
Actual value = 265
Difference = Predicted value - Actual value = 275 - 265 = 10
Percent error = (Difference / Actual value) * 100
= (10 / 265) * 100
= 0.037735849 * 100
≈ 3.77%
Therefore, the percent error in their prediction is approximately 3.77%.