Question

Anson estimated he would need 17 hours to complete is science project. He actually needed 19 1/2 hours. What was his percent error?

Answer 1

Answer: 14.7%

Explanation:

% error = (estimated - actual) / (actual) x 100

% error = (17 - 19.5) / 17 x 100 = - 14.7%

The negative sign means that he underestimated the time needed