Its the same as finding average of numbers. Turn % into decimal (like 78.8% into .788) add the %'s up and divide by # of percentages. Ex: 50%, 30%, 26%... .5+.3+.26=.96...divide by 3. .96/3=.32...average is .32 or 32%

Add them up and divide by 2

Your question does not make sense. It can be interpreted a couple of ways. The

__average of a group of percentages__can be calculated according to**any formula that you wish**. A percentage is a ratio. It usually**does not make sense to average ratios**, unless they all have the same base number or the same weighting. (Yes, this is often done in school, where percentage grades on tests are averaged. Giving a 2-question quiz the same weight in an average as a 50-question quiz seems unfair to me.)) The**usual formula for an average**is**average = (sum of numbers)/(number of numbers)**The__percentage of an average__can be defined, too. A percentage of any number is**the product of the number and the percentage**. Recognize that a percentage can be expressed as a ratio (or fraction) or a decimal number, if those are more convenient for your calculation. Many people do not need to convert 10% to any other form in order to recognize that multiplying by it means moving the decimal point one place to the left, for example.