The percent error of Andy's estimation is 18.64 %
Solution:
Given, Andy estimated that he would need 70 feet of lumber for a tree house project
The actual amount of lumber needed was 59 feet
We have to find what was the percent error of Andy's estimation
The error percentage is given as:
[tex]\text { percent error }=\frac{\text { lexpected amount-actual amountl }}{\text { actual amount }} \times 100[/tex]
[tex]\text { Percent error }=\frac{|70-59|}{59} \times 100[/tex]
[tex]=\frac{11}{59} \times 100=0.18644 \times 100[/tex]
[tex]\text { Percent error }=18.64 \%[/tex]
Hence, the andy’s percent error is 18.64%
