Percent Change and percent error Practice

Front

What is percent change?

Back

Percent change is a measure of how much a quantity has increased or decreased relative to its original value, expressed as a percentage.

Front

How do you calculate percent change?

Back

Percent Change = ((New Value - Old Value) / Old Value) x 100.

Front

If a class size increased from 27 to 30, what is the percent change?

Back

11%.

Front

What is the formula for percent increase?

Back

Percent Increase = ((New Value - Old Value) / Old Value) x 100.

Front

If the number of people signed up for a bus trip increased from 32 to 45, what is the percent increase?

Back

41%.

Front

How do you find the percent error?

Back

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

Front

If Jessie estimated her cat's weight to be 8 pounds and the actual weight was 10 pounds, what is the percent error?

Back

20%.

Front

What is the percent error if the estimated attendance for a game was 15,000 and the actual attendance was 12,500?

Back

20%.

Front

What does a positive percent change indicate?

Back

A positive percent change indicates an increase in value.

Front

What does a negative percent change indicate?

Back

A negative percent change indicates a decrease in value.