Percent Increase & Decrease

Front

What is percent increase?

Back

Percent increase is a measure of how much a quantity has grown relative to its original amount, expressed as a percentage.

Front

What is percent decrease?

Back

Percent decrease is a measure of how much a quantity has shrunk relative to its original amount, expressed as a percentage.

Front

How do you calculate percent increase?

Back

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

Front

How do you calculate percent decrease?

Back

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

Front

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

Back

Percent Increase = ((75 - 50) / 50) x 100 = 50%.

Front

If a price decreases from $80 to $60, what is the percent decrease?

Back

Percent Decrease = ((80 - 60) / 80) x 100 = 25%.

Front

What does it mean if a value increases by 100%?

Back

It means the value has doubled.

Front

What does it mean if a value decreases by 50%?

Back

It means the value has been reduced to half of its original amount.

Front

If a shirt costs $40 and is on sale for $30, what is the percent decrease?

Back

Percent Decrease = ((40 - 30) / 40) x 100 = 25%.

Front

If a student’s score increases from 70 to 85, what is the percent increase?

Back

Percent Increase = ((85 - 70) / 70) x 100 = 21.43%.