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 shirt costs $20 and is now $15, what is the percent of change?

Back

Percent of Change = ((15 - 20) / 20) x 100 = -25%. This is a decrease of 25%.

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 the original price of a book is $30 and it is now $24, what is the percent of change?

Back

Percent of Change = ((24 - 30) / 30) x 100 = -20%. This is a decrease of 20%.

Front

What is the percent of change if a population increases from 1,000 to 1,200?

Back

Percent of Change = ((1200 - 1000) / 1000) x 100 = 20%. This is an increase of 20%.

Front

If a car's value decreases from $15,000 to $12,000, what is the percent of change?

Back

Percent of Change = ((12000 - 15000) / 15000) x 100 = -20%. This is a decrease of 20%.

Front

What is the percent of change if a student's score improves from 70 to 85?

Back

Percent of Change = ((85 - 70) / 70) x 100 = 21.43%. This is an increase of approximately 21.43%.

Front

If a product's price goes from $50 to $40, what is the percent of change?

Back

Percent of Change = ((40 - 50) / 50) x 100 = -20%. This is a decrease of 20%.