Percent Increase, Decrease, Error

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What is Percent Error?

Back

Percent Error is a measure of how inaccurate a measurement is, expressed as a percentage of the actual value. It is calculated using the formula: Percent Error = |(Measured Value - Actual Value)| / Actual Value * 100.

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How do you calculate Percent Increase?

Back

Percent Increase is calculated using the formula: Percent Increase = (New Value - Original Value) / Original Value * 100.

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How do you calculate Percent Decrease?

Back

Percent Decrease is calculated using the formula: Percent Decrease = (Original Value - New Value) / Original Value * 100.

Front

What is the formula for calculating Percent Error?

Back

Percent Error = |(Measured Value - Actual Value)| / Actual Value * 100.

Front

If a TV's price decreases from $200 to $160, what is the percent decrease?

Back

Percent Decrease = (200 - 160) / 200 * 100 = 20%.

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If a population increases from 17,600 to 21,300, what is the percent increase?

Back

Percent Increase = (21,300 - 17,600) / 17,600 * 100 = 15.34%.

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What is the percent error if the measured length is 12 cm and the actual length is 14.25 cm?

Back

Percent Error = |(12 - 14.25)| / 14.25 * 100 = 15.79%.

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What does a percent error of 25% indicate?

Back

A percent error of 25% indicates that the measured value is 25% off from the actual value.

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If Lisa predicted a temperature of 60 degrees but it reached 80 degrees, what is her percent error?

Back

Percent Error = |(60 - 80)| / 80 * 100 = 25%.

Front

What is the difference between percent increase and percent decrease?

Back

Percent Increase measures how much a value has grown, while Percent Decrease measures how much a value has shrunk.