Question

IS 33.3% CORRECT???
Sally estimated that her call would take 21 minutes but it actually took 15 minutes. What was her percent of error?

Answer 1

Percent of Error = |True Value - Estimated Value|/(True Value)

Answer 2

So


Percent of Error = |15 - 21|/15

Answer 3

and in the end, you multiply the result by 100 to get a percentage