Percent Increase and 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 population decreases from 200 to 150, what is the percent decrease?

Back

Percent Decrease = ((200 - 150) / 200) x 100 = 25%.

Front

What is the formula for finding the original value after a percent increase?

Back

Original Value = New Value / (1 + Percent Increase/100).

Front

What is the formula for finding the original value after a percent decrease?

Back

Original Value = New Value / (1 - Percent Decrease/100).

Front

Darren makes $12 every hour. He gets a raise of $15 per hour. What was his percent of increase?

Back

25%.

Front

Sierra had 48 pencils on Monday, and then 54 on Tuesday. What percentage did she increase by?

Back

12.5%.