Countertop

Question

Jonathan needs to purchase a countertop for his kitchen. Jonathan measured the countertop as 5ft. The actual measurement is 4.5 ft. What is Jonathan's percent error?

Answer 1

% error = error / measured

% error = (5 - 4.5) / 5

% error = 0.5 / 5

 

Can you determine?

Answer 2

"Jonathan needs to purchase a countertop for his kitchen. Jonathan measured the countertop as 5ft. The known size is 4.5 ft. What is Jonathan's percent error?"

 

Jonathan's measurement is off by a percentage of the known size (it is not specified how we know what that is because a "measurement" of any kind has a percent error).

 

%error = |(measured - known)/known|*100%

%error = |(5 - 4.5)/4.5|*100%

%error = |0.5/4.5|*100%

%error = 11.1%

Answer 3

% error = [| experimental measure - actual measure | / actual measure] * 100

 

            = [ | 5 ft - 4.5 ft | / 4.5 ft] * 100

 

 

Complete the calculation.

 

 

Note:  | | means absolute value.