Percent of Change

Front

What is Percent of Change?

Back

Percent of Change is a way to express how much a quantity has increased or decreased in relation to its original amount, calculated as (New Value - Original Value) / Original Value x 100%.

Front

How do you calculate the percent of increase?

Back

To calculate the percent of increase, use the formula: ((New Value - Original Value) / Original Value) x 100%.

Front

How do you calculate the percent of decrease?

Back

To calculate the percent of decrease, use the formula: ((Original Value - New Value) / Original Value) x 100%.

Front

If a ticket price increases from $20 to $30, what is the percent of change?

Back

Increase 50%.

Front

If a cost changes from $50 to $60, what is the percent of change?

Back

Increase 20%.

Front

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

Back

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

Front

What is the formula for finding the original value given the new value and percent change?

Back

Original Value = New Value / (1 + Percent Change).

Front

If a student scores 80 on a test and then scores 90 on the next test, what is the percent of increase?

Back

Increase 12.5%.

Front

If a car's value decreases from $20,000 to $15,000, what is the percent of decrease?

Back

Decrease 25%.

Front

What does it mean if the percent of change is negative?

Back

A negative percent of change indicates a decrease in value.