How do I find percent of change? I forgot so please help.

First: work out the difference (decrease) between the two numbers you are comparing.

Decrease = Original Number - New Number

Then: divide the decrease by the original number and multiply the answer by 100.

% Decrease = Decrease ÷ Original Number × 100

If your answer is a negative number then this is a percentage increase.

 

Source:

"Percentage Change | Increase and Decrease." Percentage Change. Skills You Need, n.d. Web. 08 May 2016.