Question

Andy estimated that he would need 72 feet of lumber for a tree house project. He later found that the actual amount of lumber needed was 61 feet. What was the percent error of Andy's estimation? A. 15.28%
B. 84.72%
C. 18.03%
D. 11%

Answer 1

72x = 61

x = 61/72

x = 84.72%

100 - 84.72 = 15.28

Option A.

Answer 2

The percent error of Andy's estimation is 18.03%.