Mark and Matthew signed up to walk in a 5K walk/run race. They predict it will take them 60 minutes to complete the race. Mark and Matthew finished the race in 53 minutes. What is the percent error? Round to the nearest tenth.(1
The formula to calculate the percent error is:
Percent Error = |(Observed Value - True Value) / True Value| * 100%
In this case, the observed value is 53 minutes and the true value is 60 minutes.
Plugging the values into the formula:
Percent Error = |(53 - 60) / 60| * 100%
Percent Error = |-7 / 60| * 100%
Simplifying the fraction:
Percent Error = (7 / 60) * 100%
Calculating the percent:
Percent Error = 0.116666... * 100%
Percent Error ≈ 11.7%
Rounding to the nearest tenth:
Percent Error ≈ 11.7%