To take out your percentage of points in boddunan ,manually, you need to do calculation just as you do when you take out percentage,that is, YOUR TOTAL POINTS DIVIDED BY TOTAL COMMUNITY POINTS MULTIPLIED BY 100.
But having said that, you don't have to take it out manually since it is automatically done here in the site. You just need to click MY ACCOUNT option from the main menu and then STATISTICS and under the general category last option you will see your percentage of points...!