Percent Change

Front

What is Percent Change?

Back

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

Front

How do you calculate Percent Change?

Back

To calculate Percent Change, use the formula: Percent Change = ((New Value - Original Value) / Original Value) x 100%.

Front

If the original value is 50 and the new value is 60, what is the percent change?

Back

Increase 20%.

Front

What is the percent change if a population decreases from 680 to 410?

Back

Decrease of approximately 40%.

Front

If there were 17 shark sightings in 2000 and 32 in 2010, what is the percent change?

Back

Increase of 88%.

Front

What does a positive percent change indicate?

Back

A positive percent change indicates an increase in the quantity.

Front

What does a negative percent change indicate?

Back

A negative percent change indicates a decrease in the quantity.

Front

If 200 children attended a play and 40% were boys, how many girls attended?

Back

120 girls attended.

Front

What is the formula for finding the original value if you know the percent change and the new value?

Back

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

Front

If a price increases from $50 to $60, what is the increase in dollars?

Back

The increase is $10.