Question

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 percentage error? Use proportional relationships to solve the problem. Show all your work and round your answer to the nearest tenth.

please help :')

Answer 1

Let’s call the percentage error X.

The formula would be: X = Estimated value - Actual Value / Actual Value * 100.

In this case: The Estimated value is 18 feet while the Actual Value is 16 feet.
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Solving:

18-16/16 * 100 = 2/16 * 100 = 1/8 * 100

1/8 * 100 = 100/8 = 12 4/8 = 12.5%

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Therefore: 12.5% is Teresa’s percentage error.

Answer 2

The formula for percentage error is |estimated value - actual value| / actual value * 100%.

So, |18 - 16| / 16 * 100% = 2 / 16 * 100% = 12.5%.

So, Teresa's percentage error is approximately 12.5%.