Percent Change and Error

Front

What is percent change?

Back

Percent change is a way to express the difference between an old value and a new value as a percentage of the old value.

Front

How do you calculate percent change?

Back

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

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.

Front

If the original cost of an item is $5 and the new cost is $1, what is the percent change?

Back

Decrease 80%.

Front

If the population of dogs decreases from 20 to 5, what is the percent change?

Back

Decrease 75%.

Front

How do you find the percent decrease?

Back

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

Front

What is the percent decrease in the number of bee hives if it drops from 276 to 125?

Back

Approximately 55%.

Front

If a population decreases from 680 to 410, what is the percent change?

Back

Approximately 40%.

Front

What is percent error?

Back

Percent error is a measure of how inaccurate a measurement is, expressed as a percentage of the true value.