Question

Mrs. Rowan allotted 30 minutes at the beginning of class for her students to complete an exam. The last student took 42 minutes to complete. What is Mrs. Rowan's percent error?

Answer 1

40%

Explanation:

Percentage Error

`=(change-in-time)/( exact- time) * 100\%`

From the question,

the approximated time=30 minutes.

Change in time= approximated time minus exact time = 42-30=12 minutes

This implies:

`= (12)/(30) * 100\%`

`(1200)/(30)\%`

`=40\%`

Hence Mr. Rowan's percent error

is 40%