Question

Lily estimated it would take her 1 1 hour to finish her science project for the school science fair. It actually took her 8 8 hours. What is the percent error of her estimate?

Answer 1

To calculate the percent error of Lily's estimate, subtract her estimate from the actual time and divide by the actual time. Then multiply by 100% to get the percent error.

Step-by-step explanation:

To find the percent error of Lily's estimate, we first need to calculate the difference between her estimate and the actual time it took to finish the project.

The difference is 8 hours - 1.5 hours = 6.5 hours.

Then, we divide the difference by the actual time and multiply by 100% to get the percent error:

Percent Error = (6.5 hours / 8 hours) x 100% = 81.25%