Originally Posted by

**thecapaccino** **If a compact disc that usually sells for $12.95 is on sale for $9.95, then what is the percent decreast in price, rounded to the nearest whole number?**

I was not sure of the formula...but I did come out using my common sense after my equation to an answer of 23%. I did the following

% decrease = (decrease amount / original amout ) * 100%

% decrease = (9.95 / 12.95) * 100%

% decrease = .77 or 77%

then

I just used common sense to know it must be 23%...but what equation could I use?