Question

Martha estimated there were 97 marbles in a jar for a contest. The actual number of marbles in the jar was 119. What was the percent error of Martha's estimation?

Answer 1

Answer:

Percent error of Martha's estimation is 18.48%.

Step-by-step explanation:

The number of estimated marbles in a jar = 97

The number of actual marbles in a jar = 119

Now, ERROR = ACTUAL VALUE  - ESTIMATED VALUE

                      =  119 - 97 = 22

So, the error in counting marbles = 22 marbles.

Now, $\textrm{ERROR PERCENTAGE} = \frac{\textrm{Error Value}}{\textrm{Actual Value}} \times 100$

$= \frac{22}{119} \times 100 = 18.48$

or, Percentage error = 18.48%

Hence, percent error of Martha's estimation is 18.48%.