Teresa estimates that the height of a giraffe in a zoo is 18 feet. In fact, it is 16 feet tall. What is Teresa’s percent error? Use proportional relationships to solve the problem. Be sure to show all your work, provide your answer as a percentage, and round your answer to the nearest tenth.
To find the percent error, we first need to find the difference between Teresa's estimate and the actual height of the giraffe.
Teresa's estimate: 18 feet
Actual height: 16 feet
Difference = 18 - 16 = 2 feet
Next, we need to find the percent of the error by dividing the difference by the actual height and multiplying by 100.
Percent error = (Difference / Actual height) * 100
= (2 / 16) * 100
= 0.125 * 100
= 12.5
Therefore, Teresa's percent error is 12.5%.
step by step
Step 1: Calculate the difference between Teresa's estimate and the actual height.
Difference = Estimate - Actual height
Difference = 18 - 16
Difference = 2
Step 2: Calculate the percent error by dividing the difference by the actual height and multiplying by 100.
Percent Error = (Difference / Actual height) * 100
Percent Error = (2 / 16) * 100
Percent Error = 0.125 * 100
Percent Error = 12.5
Therefore, Teresa's percent error is 12.5%.