Teresa estimates that the heigh 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.
(4 points)
To find Teresa's percent error, we can use the formula:
Percent Error = (|Actual Value - Estimated Value| / Actual Value) * 100
Plugging in the values:
Percent Error = (|16 - 18| / 16) * 100
Simplifying:
Percent Error = (|-2| / 16) * 100
Percent Error = (2 / 16) * 100
Percent Error = 0.125 * 100
Percent Error = 12.5
Teresa's percent error is 12.5%.
Make it sound like a 7th grader
Teresa thought the giraffe in the zoo was 18 feet tall, but it was actually only 16 feet tall. To find the percent error, we use the formula:
Percent Error = (|Actual Value - Estimated Value| / Actual Value) * 100
Plugging in the numbers:
Percent Error = (|16 - 18| / 16) * 100
We need to find the difference between the actual value and the estimated value, which is 2. Then we divide that by the actual value, which is 16.
2 divided by 16 is 0.125.
To turn that into a percentage, we multiply 0.125 by 100. That gives us 12.5.
So, Teresa's percent error is 12.5%.