add up all values for the pie chart and divide each individual value by the total. This should be a decimal (like 0.35). Multiply by 100 to get the percent. (35%) Mulitply this percentage by the total angle of a circle to get the angle of the pie piece. (360*35%=126 degrees)

manishtblore

Just make a circle a big circle and lighted up I meant right in the circle