Percent Increase and Decrease

Front

What is percent increase?

Back

Percent increase is the amount of increase expressed as a percentage of the original amount. It is calculated using the formula: ((New Amount - Original Amount) / Original Amount) x 100.

Front

What is percent decrease?

Back

Percent decrease is the amount of decrease expressed as a percentage of the original amount. It is calculated using the formula: ((Original Amount - New Amount) / Original Amount) x 100.

Front

How do you calculate the new amount after a percent increase?

Back

To calculate the new amount after a percent increase, use the formula: New Amount = Original Amount + (Original Amount x Percent Increase).

Front

How do you calculate the new amount after a percent decrease?

Back

To calculate the new amount after a percent decrease, use the formula: New Amount = Original Amount - (Original Amount x Percent Decrease).

Front

If a book costs $20 and is marked down by 25%, what is the new price?

Back

New Price = $20 - ($20 x 0.25) = $15.

Front

If a population of 200 trees increases by 50%, what is the new population?

Back

New Population = 200 + (200 x 0.50) = 300 trees.

Front

What is the formula to find the percent of change?

Back

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

Front

If a car travels 150 miles and then travels 180 miles, what is the percent increase in distance?

Back

Percent Increase = ((180 - 150) / 150) x 100 = 20% increase.

Front

If a store has 80 shirts and sells 20, what is the percent decrease in shirts?

Back

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

Front

What does a 100% increase mean?

Back

A 100% increase means the new amount is double the original amount.