Answer:
The percent error is 34.28 %.
Step-by-step explanation:
It is given that,
Observed height of the building is 23 feet and the actual height of the building is 35 feet.
We need to find the percentage error. It is given by :
[tex]\%=\dfrac{\text{actual value}-\text{observed value}}{\text{actual value}}\times 100[/tex]
Plugging all the values, we get :
[tex]\%=\dfrac{35-23}{35}\times 100\\\\\%=34.28\%[/tex]
So, the percent error is 34.28 %.