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Percent Change (Increase or Decrease)

In this video, we will be learning how to determine percent change.

Percent Change Formula: \frac{New Value - Original Value}{Original Value}\cdot100\%=Percent Change

For example:

The price of gas was originally $5. The new price for gas is $4. What is the percent change?

\frac{New Value - Original Value}{Original Value}\cdot100\%=Percent Change

\frac{(4) - (5)}{(5)}\cdot100\%=Percent Change\leftarrow Substitute the givens

\frac{(4) - (5)}{(5)}\cdot100\%=Percent Change\leftarrow Simplify

\frac{-1}{5}\cdot100\%=Percent Change

 

-20\%=Percent Change
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