How do i work out the mean percentage of a list of numbers?

i have a list of numbers; 11,13,15,16,16,16,17.18,19 and 20 and need to work out the mean percentage of them. how do i do this?How do i work out the mean percentage of a list of numbers?
11+13+15+16+16+16+17+18+19 +20


mean= ----------------------------------------鈥?br>

10


=18.5


mean%=18.5


------- * 100


161(sum of the ten numbers)


=11.4906%How do i work out the mean percentage of a list of numbers?
do you mean the mean, as in the average precentage of ALL the numbers or the mean percentage of the mean number?
If this is what you meant:





The mean: 161/10=16.1


(16.1/161)100 =10


The mean is 10 % of the total.