6.4 Percent of Change

Front

What is percent of change?

Back

Percent of 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 of change?

Back

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

Front

If a tablet's price changes from $360 to $280, what is the percent of change?

Back

22.2% decrease.

Front

If you finish a video game level in 32 minutes and then in 28 minutes, what is the percent of change?

Back

12.5% decrease.

Front

What is 30% off a $30 baseball cap?

Back

Michael will pay $21.00 for the cap.

Front

If a pair of jeans costs $30 and is on sale for $15, what is the percent of change?

Back

50% decrease.

Front

What is the percent of change from 41 hours to 85 hours?

Back

107.3% increase.

Front

What does a positive percent of change indicate?

Back

A positive percent of change indicates an increase in value.

Front

What does a negative percent of change indicate?

Back

A negative percent of change indicates a decrease in value.

Front

If a price increases from $50 to $75, what is the percent of change?

Back

50% increase.