Question

Jill calculates the cost of a book as $50.the actual price was $56. what is jill's percent error?

Answer 1

`E=(|x-x_r|)/(x_r)*100`

where x is the estimated value and xr the real value

`\begin{gathered} E=(|50-56|)/(56)*100 \\ \\ E=(|-6|)/(56)*100 \\ E=(6)/(56)*100 \\ E=10.71 \end{gathered}`

the percent error is 10.71%