Question

A zookeeper predicted the weight of a new baby elephant to be 261 pounds when it was born. The elephant actually weighed 293 pounds at birth. What was the percent error of the zookeeper's prediction?
A. 32%
B. 12.26%
C. 10.92%
D. 89.08%

Answer 1

Percent error=|$\frac{predicted value-actual value}{predicted value}$| times 100
(note the || is absolute value, means that whatever the result is inside, it is made positive)

predicted value=261
actual value=293
subsitute
percent error=|$\frac{261-293}{261}$| times 100
so using pemdas
do parenthasees first
|$\frac{-32}{261}$|
|-0.12|
absolute value
0.1226

time 100
0.1226 times 100=12.26
answer is 12.26%
answer is B