The weatherman predicted that today's temperature would be 64°F. It was actually 38°F. What was the percent error of the weatherman's prediction?

Question

42.55%

40.63%

64.82%

68.42%

Answer 1

To find the percent error, we can use the formula:

percent error = |(measured value - predicted value) / predicted value| * 100%

In this case, the predicted value is 64°F and the measured value is 38°F.

percent error = |(38 - 64) / 64| * 100%
= |-26 / 64| * 100%
= 0.40625 * 100%
= 40.63%

So the percent error of the weatherman's prediction is 40.63%. Therefore, the correct option is 40.63%.