Percent Error Practice Worksheet
A Grade 8 math worksheet focusing on understanding and calculating percent error with real-world examples.
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Percent Error Practice
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Read each question carefully and calculate the percent error. Round your answers to two decimal places where necessary.
1. A student estimates the weight of a textbook to be 4 pounds. The actual weight of the textbook is 3.5 pounds. What is the percent error of the student's estimate?
2. Percent error is calculated using the formula: (|Observed Value - Actual Value| / ) * 100%.
3. A positive percent error means the estimated value was than the actual value.
4. The actual length of a rope is 20 feet. A measurement states the length is 22 feet. Which of the following is the correct percent error calculation?
((22 - 20) / 22) * 100%
((20 - 22) / 20) * 100%
((22 - 20) / 20) * 100%
((20 - 22) / 22) * 100%
5. A scientist measures the boiling point of a liquid to be 98°C. The accepted boiling point of the liquid is 100°C. Calculate the percent error.
6. Percent error can sometimes be a negative value.
True
False
7. A recipe calls for 2 cups of flour. You accidentally use 2.2 cups. What is the percent error in your measurement?
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