Question

Please help with the question below (please try to answer in maximum 1/5 minutes).

Answer 1

Given:

He thought he had purchased 7 folders.

He had only purchased 6.

To find:

The per cent error.

Explanaton:

According to the problem,

The predicted value is 7.

The actual value is 6.

Using the formula,

$\begin{gathered} Percent\text{ error }=\frac{|Prediction-Actual|}{|Actual|}\times100 \\ =\frac{|Prediction-Actual|}{|Actual|}\times100 \\ =\frac{|7-6|}{6}\times100 \\ =\frac{1}{6}\times100 \\ =16.66 \\ \approx17\% \end{gathered}$

Therefore, the percent error is 17%.

Final answer:

The percent error is 17%.