Martha estimated there were 93 marbles in a jar for a contest. The actual number of marbles in the jar was 115. What was the percent error of Martha's estimation?
80.87%
23.66%
19.13%
22%

Question

Martha estimated there were 93 marbles in a jar for a contest. The actual number of marbles in the jar was 115. What was the percent error of Martha's estimation?
80.87%
23.66%
19.13%
22%

danjs · Answer

Take the difference in the values, divided by the total marbles in the jar

danjs · Answer

multiply that by 100

danjs · Answer

She was (115-93) off the value, out of 115 actual marbles.

jhannybean · Answer

Percent error = $\dfrac{\left|\text{actual - theoretical}\right|}{\text{theoretical}} \times 100\%$

danjs · Answer

$$\frac{ 115 - 93 }{ 115 } *100 = ~~~??~~percent$$