Question

Question

Ms. Ellis expected 50 families to attend parent–teacher conferences, but 60 families attended. What is the percent error?

Answer 1

Answer: 20%

Explanation:

The expected value was 50, the value in reality was 60, so

(60 - 50) / 50

= 10/50

= 1/5

To convert to a percent we multiply by 100:

= 20%.