Percent Error Practice Worksheet
Practice calculating percent error in various real-world scenarios for Grade 9 mathematics.
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Percent Error Practice Worksheet
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Read each question carefully and calculate the percent error. Round your answers to two decimal places where necessary.
1. Percent error is calculated using the formula: (|Actual Value - Measured Value| / ) * 100%.
2. A low percent error indicates that the measured value is close to the value.
1. A student measures the length of a table to be 152 cm. The actual length of the table is 150 cm. What is the percent error?
1.33%
2.00%
0.67%
1.25%
2. A scientist predicts that a reaction will produce 25 grams of product. After the experiment, 23 grams of product are obtained. What is the percent error?
8.00%
8.70%
0.08%
0.02%
1. A baker estimates that a cake will weigh 1.5 kg. The actual weight of the cake is 1.65 kg. Calculate the percent error.
2. A weather forecaster predicted a high temperature of 20°C. The actual high temperature was 22°C. What is the percent error in the forecast?
1. A percent error of 0% means the measured value is exactly the same as the actual value.
True
False
2. Percent error can be a negative value.
True
False
A technician uses a ruler to measure the length of a circuit board. The actual length is 10 cm. The technician measures it as 10.3 cm.
Calculate the percent error in the technician's measurement.
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