12/5/24 Practice 3-4 Percent Error

Front

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 = |(Estimated Value - Actual Value)| / |Actual Value| * 100.

Front

How do you calculate percent change?

Back

Percent change is calculated using the formula: Percent Change = (New Value - Old Value) / |Old Value| * 100.

Front

If you guessed that a team would win 95 games but they won 103, what is the percent error?

Back

7.8%

Front

What is the percent change if a class size increases from 35 to 42 students?

Back

20%

Front

If a movie ticket price decreases from $12 to $8, what is the percent change?

Back

33%

Front

How do you round a number to the nearest tenth?

Back

To round to the nearest tenth, look at the hundredths place. If it is 5 or greater, round up the tenths place by one. If it is less than 5, keep the tenths place the same.

Front

What is the formula for calculating percent error?

Back

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

Front

What was the attendance change at a music festival from 2,376 to 2,950?

Back

Increase 24%

Front

If Heather measures an acceleration of 10.91 m/s² but the actual is 9.80 m/s², what is her percent error?

Back

11.33%

Front

What does a percent change of 20% indicate?

Back

It indicates that the new value is 20% greater than the old value.