Percent Change

Front

What is percent change?

Back

Percent change is a way to express a change in a quantity as a percentage of the original amount. It can be a percent increase or a percent decrease.

Front

How do you calculate percent decrease?

Back

Percent decrease = ((Original Price - Sale Price) / Original Price) x 100.

Front

How do you calculate percent increase?

Back

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

Front

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

Back

New Value = Original Value + (Original Value x Percent Increase).

Front

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

Back

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

Front

If a price decreases from $100 to $80, what is the percent decrease?

Back

Percent decrease = ((100 - 80) / 100) x 100 = 20%.

Front

If a population increases from 50 to 60, what is the percent increase?

Back

Percent increase = ((60 - 50) / 50) x 100 = 20%.

Front

What does it mean if a value has a percent change of 0%?

Back

A percent change of 0% means there is no change in the value; it remains the same.

Front

How can you express a percent change as a fraction?

Back

Percent change can be expressed as a fraction by dividing the percent by 100.

Front

What is the percent change if a student scores 70 points and then scores 90 points?

Back

Percent change = ((90 - 70) / 70) x 100 = 28.57%, rounded to 29%.