How to overlap pie chart with same radius?

Hi,

i am overlapping 2pie chart with same radius.

1. with labels 
2. without labels.

Output 
pie chart 2 with label of first. 


http://r.789695.n4.nabble.com/file/n4639723/Ist_Pie.png 

http://r.789695.n4.nabble.com/file/n4639723/IInd_Oie.png 


output:

http://r.789695.n4.nabble.com/file/n4639723/Screenshot-7.png 


How can i implement it?

Regards



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